नेपालमा फेरि कोरोना संक्रमण बढ्ने ९ कारण (समाधानको उपायसहित)



डा. सन्तोष दुलाल-अनुसन्धान बैज्ञानिक तथा जिवाणु विज्ञ

विगत २ महिनायता नेपाल र भारतको दैनिक कोरोना संक्रमणको तथ्याङ्कलाई विश्लेषण गर्दा बढ्दो क्रममा छ ।

बढ्दो क्रम

दैनिक कोरोना संक्रमण विगत १ महिनामा (तलको लेखाचित्र अनुशरण गर्नुहोस्):
नेपालमा औसत २.५ गुणाले र भारतमा करिव ३ गुणाले संक्रमण दरमा वृद्धि भएको देखिएको छ ।

पहिलो वेवको चरम बिन्दुको ६ महिनाको समयावधि भारतमा पुगेको छ भने नेपालमा अप्रिल–मे मा (अब छिट्टै) पुग्नेछ, जहाँ महामारीको दोस्रो वेवको चरण सुरु हुने वैज्ञानिक अध्ययनले अनुमान गरेको छ ।

नेपालमा कोरोना संक्रमण वृद्धि हुने केही चुनौतीहरू यस प्रकार छन्–
१. हाल भारतका १२ वटा राज्यहरू र ४८ वटा जिल्लाहरूमा कोरोना संक्रमण वृद्धि भएको अवस्था हुनु ।

२. महाराष्ट्र राज्यमा मात्र दैनिक ३१ हजार भन्दा बढी नयाँ संक्रमित (२३% भन्दा बढी परीक्षणमा संक्रमण दर) थपिनु ।

३. नयाँ प्रकारका कोरोना भाइरसका भेरियन्ट्स (आनुवंशिक उत्परिवर्तित स्वरुपहरू) यूके भेरिएन्ट, ब्राजिल भेरिएन्ट, दक्षिण अफ्रिका भेरिएन्ट, डबल म्युन्टेन्स भेरिएन्ट भारतमै देखिनु ।

४. नेपाल–भारत खुल्ला सिमाना र दैनिक हजारौं नेपाली जनस्वास्थ्यका नियम, मापदण्ड पालन नगरी नेपाल फर्कनु ।

५. सिमा नाकामा कोरोना रोकथाम तथा नियन्त्रणमा यथेस्ट गतिविधिहरू तथा जनस्वास्थ्यका रणनीतिहरू नअपनाउनु ।
(सम्भावित कोरोना संक्रमितको परीक्षण नहुनु, ढिला हुनु, संक्रमितको कन्ट्याक्ट् ट्रेसिङ, क्वारेनटाइन अनुशरण र व्यवस्थापन, आइसोलेसन पूर्ण रूपले नहुनु, संक्रमित समुदायसम्म पुग्नु, घुलमिल हुनु)

६. अन्तर्निहित कोरोना खोपहरूको अभाव र अनिश्चितता, खोपहरू अनुकूल वितरणमा खोप बनाउने राष्ट्रको मात्र पहुँच र नियन्त्रण हुनु ।

७. विश्व स्वास्थ्य संगठन (डब्ल्यूएचओ) को न्यून र मध्य आय भएका देशहरूमा गुणस्तरीय कोरोना खोपहरू अधिग्रहण र सहज वितरणअन्तर्गत कोभ्याक्स कार्यक्रमले अझै नेपाल जस्ता देशहरूमा खोपको प्रभावकारी वितरण गर्न असमर्थ हुनु ।

८. नयाँ कोरोना भेरियन्टका लागि खोपले के कति प्रभावकारी काम गर्दछ, गर्दैन ? भन्ने ठोस वैज्ञानिक प्रमाणको अभाव हुनु ।

९. नागरिकहरू अझै पनि कोरोना÷कोभिड–१९ प्रति संवेदनशील नहुनु र रोकथाम तथा नियन्त्रणमा जनस्वास्थ्यका मापदण्ड पालन नगर्नु ।

यी माथिका चुनौतीहरू दीर्घकालीन रूपमा सामना गर्न सकिएन भने नेपालमा कोरोनाको जोखिमलाई आगामी दिनमा नियन्त्रण गर्न कठिन हुने आँकलन गर्न सकिन्छ ।

सत्य यो हो कि नेपालमा कोरोना महामारी दीर्घकालीन रूपमा नियन्त्रण गर्न भारत तथा छिमेकी देशहरूमा र नेपालको हरेक क्षेत्र र ठाउँमा कोरोना संक्रमण शून्य हुनु पर्नेछ ।

वर्तमान परिस्थितिमा कोरोना संक्रमण नियन्त्रणका उपयुक्त रणनीतिक कदमहरूः

– डिजिटल मोबाइल सम्पर्क ट्र्याकिङ र ट्रेसिङ

– द्रुत परीक्षण प्रणाली र भेरियन्ट पहिचान प्रणाली
– स्थानीय स्तरमा व्यवस्थित क्वारेनटाइन, आइसोलेसन अनुशरण
– र्यापिड रेस्पोन्स टिमको सक्रिय संलग्नता
– कोरोना प्रसारण र संक्रमणको प्रारम्भिक चेतावनी प्रणाली, हट स्पोटको पहिचान र अस्थायी हट स्पोट सिल गर्ने
– नैतिक अभ्यास पालना गर्दै कोरोना सम्बन्धित व्यवस्थित अध्ययन र अनुसन्धान
कार्यहरूले नयाँ आयाम र मार्ग प्रस्तुत गर्दछ ।

संक्रमित रोकथाम र उपचारमा पछिल्लो वैज्ञानिक चिकित्सीय दृष्टिकोण र रणनीतिहरूको उपयोग र उपचारलक्षित स्थानीय तहदेखि केन्द्रीय स्तरसम्म सामूहिक सहकार्यहरू तुरुन्त विनाशकारी स्थिति रोक्न समयमा नै महत्वपूर्ण भूमिका खेल्छ ।

यस महामारी नियन्त्रणमा बहुपक्षीय दृष्टिकोणसहित उचित आर्थिक संसाधनको प्रबन्ध र पछिल्ला अनुभव र सिकिएका पाठहरू बाट जस्तोसुकै महामारीको कठिन परिस्थितिसँग सामना गर्न यथाशीघ्र तयारी, र जनस्वास्थ्यका नियम, मापदण्ड पालन गर्न स्वयम् नागरिक प्रतिवद्ध र जिम्मेवारी बहनले मात्र हामी कोरोना कहरलाई पूर्ण रूपमा परास्त गर्न सफल हुनेछौं ।

(डा.दुलाल नेपाली वैज्ञानिक तथा जिवाणु विज्ञ हुन् । उनी हाल आनन्दवन अस्पतालमा अनुसन्धान वैज्ञानिकको रुपमा कार्यरत छन् ।)



...
Mmmtnw

order generic diamox buy imuran online azathioprine 50mg oral

...
Sqixpy

buy coreg 25mg online cheap order aralen 250mg aralen generic

...
Pkoobj

buy benicar 10mg cost olmesartan depakote 500mg cheap

...
Jylgpb

mesalamine online order order mesalamine 800mg pills irbesartan 150mg canada

...
Nuzzqe

order levitra 10mg sale tizanidine 2mg ca buy plaquenil

...
Pvcxcx

buy ramipril sale buy ramipril 10mg without prescription purchase arcoxia

...
Tffqwn

brand levitra 10mg buy hydroxychloroquine 400mg online plaquenil tablet

...
Ksdywm

ivermectin 12 mg stromectol stromectol cheap cost deltasone 5mg

...
Uneifw

furosemide online buy furosemide 40mg over the counter ventolin inhalator drug

...
Ahhvoe

tadalafil 5mg price cheap tadalafil 10mg tadalafil canada

...
Ndezzu

order azithromycin 500mg sale buy prednisolone sale order gabapentin online

...
NmuiMycle

fluoxetine contraindications herbal supplements https://prozacfluoxetineatb.com/ how long does it take for prozac to get out of your system

...
Pjccqx

buy leflunomide 20mg online cheap azulfidine 500mg tablet azulfidine medication

...
Jnwaad

order isotretinoin 40mg buy zithromax 500mg sale order zithromax 250mg online cheap

...
Fazesq

minocycline 100mg over the counter buy minocycline pills order actos sale

...
Vonnde

purchase sildenafil sale sildenafil for sale sildenafil for women

...
Eokwsu

catapres cheap purchase spiriva pills spiriva cost

...
Osgnkeymn

what is lexapro prescribed for https://lexaproescitalopramikd.com/ switching from paxil to lexapro

...
Skxfwk

careprost online buy methocarbamol brand trazodone tablet

...
Wxrfgj

order trimox 500mg online cheap trimox 250mg pill biaxin usa

...
NzxxzDergO

prozac meaning https://prozacfluoxetinesyu.com/ prozac drug test

...
EemgSwive

equate omeprazole magnesium does omeprazole cause dementia prilosec ingredient

...
EdglSwige

switching from prozac to cymbalta stopping duloxetine side effects duloxetine 20 mg capsule delayed release

...
Hegsinimb

seroquel 100mg street price https://seroquelquetiapinesxz.com/ teva quetiapine anxiety

...
NemgMycle

what allergy medicine can i take with fluoxetine https://prozacfluoxetinerfk.com/ fluoxetine nausea

...
Ichadc

indocin 75mg drug indomethacin 50mg pills generic suprax 100mg

...
Osgnkeymn

what is escitalopram 20 mg used for https://lexaproescitalopramikd.com/ escitalopram oxalate 10mg

...
Ftgztj

order nolvadex 20mg pill budesonide oral order ceftin 500mg generic

...
Wbnrma

cheap avana buy diclofenac 50mg for sale diclofenac online

...
NzxzDergO

viagra and amlodipine norvasc scratchy throat is there a recall on amlodipine?

...
Dwipub

clindamycin usa buy erythromycin paypal buy sildenafil 50mg pill

...
NeggMycle

xanax vs sertraline sertraline insomnia solution sertraline counseling points

...
Mmdtzi

mebendazole uk vermox uk order tadalafil online

...
EemgSwive

is prilosec over the counter prilosec vs nexium vs zantac how long does it take for prilosec to work

...
EdglSwige

cymbalta and ibuprofen cymbalta seizures does cymbalta help with nerve pain

...
Hegsinimb

liquid seroquel https://seroquelquetiapinesxz.com/ lithium vs seroquel

...
Xjahcl

cost metronidazole 400mg metronidazole 400mg tablet buy generic keflex over the counter

...
Wucyaa

brand estrace buy prazosin medication purchase minipress online cheap

...
Osgkeymn

lexapro bipolar teva-escitalopram escitalopram dosages

...
Psaqhe

buy fluconazole 200mg pill ampicillin price order ciprofloxacin online cheap

...
NengMycle

sertraline hcl 50 mg high sertraline 150 stopping sertraline side effects

...
NzedDergO

amlodipine valsartan price https://norvascamlodipineshe.com/ amlodipine besylate en espaГ±ol

...
EnrcSwive

omeprazole action https://prilosecomeprazolezrv.com/ buying omeprazole

...
Henhinimb

quetiapine fumarate withdrawal symptoms https://seroquelquetiapinevuq.com/ seroquel experiences

...
Cdcvbs

order cialis for sale tadalafil 20mg cost viagra 100mg generic

...
EjolSwige

increasing cymbalta from 60 to 120 substitute for duloxetine taking cymbalta

...
Yknany

order duricef 250mg online cheap buy generic epivir online order finasteride 1mg generic

...
Yatobo

tegretol 200mg price order carbamazepine pill lincocin 500 mg for sale

...
Oltgkeymn

escitalopram vs escitalopram oxalate https://lexaproescitalopramtns.com/ side effect of lexapro

...
NtvsDergO

norvasc side effects weight gain pharmacy question: what the generic drugs to subtitute for norvasc norvasc patient assistance

...
Hrjqrs

buy simvastatin 20mg generic simvastatin 20mg over the counter free shipping viagra

...
NtcsMycle

how to wean off zoloft 100mg https://zoloftsertralineabu.com/ zoloft use

...
EnsfSwive

omeprazole horses famotidine vs prilosec problems with prilosec

...
EcrtSwige

duloxetine and tinnitus https://cymbaltaduloxetineztn.com/ cymbalta weight

...
Hezainimb

seroquel 25mg how long does it take seroquel to work seroquel 50 mg street price

...
Ahjdmy

starlix 120mg ca candesartan 16mg pill buy generic atacand 16mg

...
Owbodw

buy nebivolol 20mg pill diovan 80mg drug clozapine 50mg uk

...
Famlqi

buy prometrium 200mg generic buy tinidazole tablets olanzapine 10mg for sale

...
Ydqzxd

combivent 100 mcg usa purchase zyvox online order zyvox 600 mg online cheap

...
Xxifwq

order betnovate 20 gm oral anafranil sporanox ca

...
Lmegyi

cymbalta without prescription cymbalta cheap buy nootropil 800 mg pill

...
Thimso

buy tamsulosin medication brand spironolactone 25mg spironolactone over the counter

...
Fuyzfl

order clopidogrel 150mg sale order clopidogrel online ketoconazole order online

...
Sxllib

ranitidine 300mg price order celebrex pills brand celecoxib 100mg

...
Yclwho

toradol cost order inderal 20mg pills order inderal 20mg generic

...
Yejhyn

order generic sumycin generic baclofen ozobax usa

...
Fgjytz

imitrex online order buy dutasteride generic avodart 0.5mg drug

...
Jupnta

purchase crestor generic purchase domperidone without prescription domperidone cost

...
Gjctrd

cheap cozaar buy losartan 50mg pill buy topiramate medication

...
Dwpxhj

order xenical 60mg pill zyloprim over the counter order zyloprim online

...
Armwha

methotrexate 10mg sale reglan 20mg usa reglan 10mg usa

...
Uuzusa

order generic pregabalin 75mg priligy cheap priligy sale

...
Fsvubx

order generic lisinopril buy metoprolol 50mg online cheap metoprolol 100mg cost

...
Lwqpog

purchase biltricide online cheap buy hydrochlorothiazide without a prescription buy periactin 4mg online

...
Ufzbge

buy glucophage 500mg generic atorvastatin 20mg usa order norvasc 5mg pill

...
Jrvifd

albenza generic buy aripiprazole generic buy cheap provera

...
Mjypdw

synthroid 150mcg drug buy levoxyl pill where can i buy levitra

...
Gfysaj

buy atenolol generic medrol 8mg over counter order femara 2.5mg pill

...
Slemce

buy generic doxycycline oral augmentin 625mg amoxiclav tablet

...
Hngpjb

clomid 100mg brand plaquenil usa hydroxychloroquine medication

...
Lgdzmv

prednisolone 40mg ca oral lasix 40mg furosemide sale

...
Mtrcgh

purchase albuterol sale order amoxiclav generic buy cheap levothyroxine

...
Rbiumz

buy neurontin cheap buy lasix generic generic doxycycline 200mg

...
Ahnmon

accutane without prescription azithromycin 250mg tablet azithromycin online order

...
EnwbsMycle

tadalafil without prescription https://hippharmo.com/

...
Visqlf

amoxil ca zithromax 250mg price buy prednisolone 10mg for sale

...
Bcmekp

provigil 200mg oral purchase phenergan pill prednisone 40mg without prescription

...
Nshgpq

stromectol human deltasone over the counter accutane 40mg brand

...
Yspnyj

order tadalafil 20mg for sale us cialis buy ed pills

...
Nsdzqu

cheap tadalafil 40mg erection pills that work buy erectile dysfunction medications

...
Kmuqqg

cost femara 2.5mg sildenafil overnight shipping us viagra

...
Ptrzzc

atorvastatin 40mg us viagra order online viagra 50mg oral

...
Avasqe

order generic lexapro oral lexapro 10mg buy generic revia over the counter

...
Rkjvvu

buy cenforce paypal buy cenforce 50mg without prescription buy glycomet no prescription

...
Yntmbh

generic cetirizine sertraline over the counter zoloft 50mg cheap

...
Nwbywf

warfarin medication buy warfarin sale buy allopurinol 100mg sale

...
Klgmjn

buy levofloxacin 250mg online cheap actigall over the counter cost bupropion 150 mg

...
Rbsekj

zetia where to buy zetia cheap purchase methotrexate generic

...
Ecaipp

cheap promethazine order phenergan online order cialis 5mg online cheap

...
Oargrb

uroxatral 10mg pills diltiazem tablet diltiazem cheap

...
Pmongt

purchase viagra online sildenafil 150mg price order tadalafil 5mg online cheap

...
Fqddig

order simvastatin promethazine sale purchase sildalis generic

...
Wykzyi

dapsone pill cheap dapsone 100 mg tenormin 100mg for sale

...
Krxvrf

oral cefdinir prevacid 30mg without prescription order generic protonix 40mg

...
Xhfrbq

buy ditropan generic prograf oral buy oxcarbazepine without prescription

...
Ekorpu

azathioprine usa buy telmisartan 20mg order naprosyn 250mg online

...
Eqmugb

doxycycline 100mg us order levitra for sale order zovirax pill

...
Jhwaau

dutasteride pill order generic xenical 60mg orlistat 60mg pill

...
Decuis

buy prednisolone 5mg pill buy lasix 40mg generic order furosemide sale

...
Nmvkvr

provigil 100mg for sale lisinopril 10mg generic buy generic lopressor

...
Cszwyp

isotretinoin uk order isotretinoin 20mg pill azithromycin 250mg price

...
Jyhnos

order albuterol without prescription synthroid tablets purchase augmentin pill

...
Prnmhq

ondansetron 8mg generic amoxil 1000mg usa generic bactrim 960mg

...
Puimcl

stromectol human order deltasone for sale oral deltasone 40mg

...
Yfvdsi

buy ed pills gb buy pregabalin online cheap order finasteride 1mg pills

...
Ybqnyf

order isotretinoin 40mg pills accutane 20mg price acillin cost

...
Nlbkkv

order prednisone 5mg generic order amoxicillin 500mg online cheap order amoxicillin 1000mg pills

...
Ibqfmp

purchase serophene online purchase prednisolone online oral prednisolone 10mg

...
Ijekgu

generic modafinil 200mg modafinil brand buy promethazine online cheap

...
Elyeok

buy metformin online cheap nolvadex sale buy tamoxifen 20mg

...
Eirritatismqr

purchase ivermectin online [url=https://stromectol24.top/]ivermectin horse paste[/url] ivermectin manufacturer

...
Ibclao

cialis 10mg ca trial viagra ed pills cheap

...
Bodlga

buy minocycline pills hytrin 5mg pills order hytrin pill

...
Eirritatismzu

where can i buy ivermectin [url=https://stromectol24.top/]ivermectin for chickens[/url] heartgard plus chewables ivermectin

...
Nuydks

buy cialis 40mg tadalafil express delivery generic sildenafil 50mg

...
Ageatk

purchase nexium pills buy generic clarithromycin 250mg lasix 40mg cheap

...
Onvgrq

generic tricor 200mg cheap sildenafil online viagra australia

...
Zzhvzo

tadacip 20mg generic buy generic tadalafil 10mg trimox 500mg cost

...
Hlmbxi

brand ropinirole 2mg ropinirole usa buy labetalol pill

...
Sirritatismhy

ivermectin paste for horses [url=https://stromectol24.top/]ivermectin[/url] ivermectin paste

...
Zhvphe

doxycycline over the counter order doxycycline 200mg generic methylprednisolone 8 mg oral

...
Wlloow

order famotidine 40mg online buy mirtazapine 30mg generic buy mirtazapine online

...
Wxmgzm

buy indocin 75mg pills indomethacin 50mg over the counter buy cenforce generic

...
Pwoios

nortriptyline ca buy paracetamol generic paxil 20mg drug

...
Fhtuso

priligy 30mg ca motilium ca brand domperidone 10mg

...
Yirritatismcn

clomid tablets online [url=https://clomid24.top/]clomid online no prescription[/url] can i buy clomid over the counter in uk

...
Lzjwci

buy alendronate 70mg for sale oral furadantin 100mg motrin 400mg generic

...
Jnwbfj

generic amoxicillin 500mg stromectol 3mg ca ivermectin tablets

...
Sudbyk

cheap carvedilol 25mg cost carvedilol amitriptyline 10mg brand

...
Xirritatismms

clomid pills to order [url=https://clomid24.top/]buy clomid united states[/url] where can i buy clomid online

...
Ncmfrr

lanoxin 250mg cost telmisartan without prescription molnunat sale

...
Yfwpjh

buy acetazolamide pills order imdur online cheap imuran 50mg

...
Efuwgs

purchase temovate generic buy buspirone generic oral amiodarone 100mg

...
Xgfywr

olmesartan for sale verapamil 240mg pills buy divalproex 250mg generic

...
Dmgaqq

asacol 400mg without prescription buy azelastine 10 ml generic avapro brand

...
Sirritatismnf

ivermectin injectable [url=https://stromectol24.top/]ivermectin horses[/url] ivermectin rosacea

...
Oypljw

how to write an about me essay order arava 10mg pill azulfidine 500 mg usa

...
Lfjrvv

doxycycline 200mg pills buy cleocin 300mg for sale cleocin 300mg canada

...
Bmfdqg

play online casino real money best rated canadian pharmacy buy an essay cheap

...
Kxeuws

oral ramipril 5mg buy etoricoxib 60mg sale order arcoxia 120mg online cheap

...
Wivxpz

online roulette real money casino online games for real money slot game

...
Mirritatismuz

modafinil provigil [url=https://provigil24.top/]how long does provigil[/url] provigil pills

...
Qpzffb

buy nifedipine online buy fexofenadine 180mg sale order generic fexofenadine 120mg

...
Ofrvde

best online blackjack ocean casino online online blackjack for real money usa

...
Hasndn

ivermectin otc order stromectol 6mg pills buy generic avlosulfon 100 mg

...
nof

Happy with value for money. No taste and easy to take. In order to give you a better service Tradeinn uses cookies. By continuing to browse the site you are agreeing to our use of cookies. A Clinique customer said, "I love how easily and gently this removes my eyeliner, mascara, and brow makeup, leaving those areas super soft." I ned some new Clinique products and last time we were in , 'log_autolink_impression');America they were much cheaper to buy over there than in England or at the duty free shops. Someone declared, "This is the only makeup remover I trust! It's safe for the eyelids and lips! I would try other products from time to time as I frequently receive samples from other high end products but I would always reach out for this. Easily removes even the most stubborn makeup with just one gentle wipe." https://squareblogs.net/thrive-eye-brightener-1/mary-kay-gel-patches Would recommend Enter the ingredients in EWG’s Build Your Own Report tool to get an approximate score for that product. Sorry, this product is unavailable. Please choose a different combination. Δdocument.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Vegas.pk Store Land Mark 2 E-11/2 Markaz, Islamabad Shop the full Laura Geller collection here! Consistency- The consistency of this eye liner is quite runny. It doesn’t have a thick consistency which I personally prefer. It also applies very streakily. You have to go over it again and again to get a perfect dark shade of purple. Formula is more watery and thin, rather than marker-like 50% off thanksgiving essentials! shop now Wear Time: It gives a good wear time and it might have a few minor flaws, but wear time is not one of them. It does not break or flake off and stays intact till I remove it at the end of the day with my makeup remover. However, it is not at all water proof and I mean a single streak of water will wash it off without leaving a trace of color behind; hence it does give a good wear time, as long as no water or sweat touches it.

...
Icgieb

cheap cialis online Cialis daily play poker online free

...
Jdnvrk

tadalafil buy online ed remedies order tadalafil 5mg online cheap

...
Pirritatismmd

azithromycin treats chlamydia azithromycin dose click here

...
Iygenj

actos 30mg generic actos sale sildenafil generic

...
Otuttf

singulair 10mg sale 50mg viagra sildenafil for sale

Leave a Reply

Your email address will not be published. Required fields are marked *

सम्बन्धित खबरहरु

सुन्दर देखिने रहर कसलाई नहोला र ! हरेक मानिस शारीरिक रूपमा सुन्दर देखिन चाहन्छन् । तर, खानपान र हेरचाहमा ख्याल

गाउँको नाम सुन्दा चारैतिर फैलिएको हरियालीका तस्बिर आँखाअगाडि आउन थाल्छन् । जसका कारण गाउँहरू निकै उत्साहित हुन्छन् । आज हामी

मौसम जस्तोसुकै होस्, यात्राको आफ्नै रमाइलो छ। जसरी गर्मी मौसममा विभिन्न प्रकारका लुगा लगाइन्छ, त्यसैगरी यस मौसममा जुत्ता किन्दा धेरै

इनडोर प्लान्टहरूले हावा शुद्ध पार्छ, हावामा प्रदूषकहरू घटाउँछ, अक्सिजनको स्तर बढाउँछ, तपाईँको मुड बढाउँछ र सकारात्मक वातावरण सिर्जना गर्छ। बिरुवालाई