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The deadly coronavirus that entered India while there was still nip in the air has beaten rising mercury, humid conditions, unique Indian genome and has entered monsoon season with more potency as fresh cases are only breaking all records in the country.

India recorded a single-day spike of record 24,850 new coronavirus cases on Sunday, taking its total tally to 6.73 lakh corona-positive cases.

Top Indian microbiologists were hopeful in March that after the 21-day lockdown, as summer approaches, the rise in temperature would play an important role in preventing the drastic spread of COVID-19 virus in India.

Several virologists hinted that by June this year, the impact of COVID-19 would be less than what it appeared in March-April.

The claims have fallen flat as the virus is mutating fast, becoming more potent than ever.

According to experts, the novel coronavirus is a new virus whose seasonality and response to hot humid weather was never fully understood.

"The theory was based on the fact that high temperatures can kill the virus as in sterilisation techniques used in healthcare. But these are controlled environment conditions. There are many other factors besides temperature, humidity which influence the transmission rate among humans," Dr Anu Gupta, Head, Microbiologist and Infection Control, Fortis Escorts Heart Institute, told IANS.

There is no built-up immunity to COVID-19 in humans.

"Also, asymptomatic people might be passing it to many others unknowingly. New viruses tend not to follow the seasonal trend in their first year," Gupta emphasized.

Globally, as several countries are now experiencing hot weather, the World Health Organization (WHO) reported a record hike in the number of coronavirus cases, with the total rising by 2,12,326 in 24 hours in the highest single-day increase since COVID-19 broke out.

So far over 11 million people worldwide have tested positive for the disease which has led to over 5,25,000 deaths, according to data from Johns Hopkins University. The US remained the worst-hit country with over 28 lakh cases, followed by Brazil with 15.8 lakh.

According to Sandeep Nayar, Senior Consultant and HOD, Respiratory Medicine, Allergy & Sleep Disorders, BLK Super Speciality Hospital in New Delhi, whether temperature plays a role in COVID-19 infection is highly debated.

One school of thought said in the tropical regions of South Asia, the virus might not thrive longer.

"On the other hand, another school of thought has found that novel Coronavirus can survive in a hot and humid environment and tropical climate does not make a difference to the virus. According to them, this is what distinguishes the novel coronavirus from other common viruses, which usually wane in hot weather," stressed Nayar.

Not much has been studied in the past and no definite treatment or vaccine is available to date.

"Every day, new properties and manifestation of the disease come up. As of now, the only way to prevent this monster is by taking appropriate precautions. Hand hygiene, social distancing, cough etiquette and face masks definitely reduce spread of COVID-19 infection," Nayar told IANS.

Not just top Indian health experts, even Indian-American scientists had this theory in mind that sunshine and summer may ebb the spread of the coronavirus.

Ravi Godse, Director of Discharge Planning, UPMC Shadyside Pennsylvania in the US told IANS in April: "In the summer, the humidity can go up as well, meaning more water drops in the air. If the air is saturated with water and somebody sneezes virus droplets into such air, it is likely that the droplets will fall to the ground quicker, making them less infectious. So the short answer is yes, summer/sunshine could be bettera.

According to Dr Puneet Khanna, Head of Respiratory Medicine and Pulmonology, Manipal Hospital, Delhi, COVID-19 death rates are not too different in tropical countries but since the disease affected them late it was yet to show its peak in these areas.

"The virus can survive well in hot and humid countries and this is proven now," he stressed.

Kanhangad, May 10: Kasaragod district has become free from COVID-19 on Sunday.

The last remaining patient has been tested negative for coronavirus, said district medical officer Dr. A. V. Ramdas.

He added that the officials are proud to have been able to cure all 178 COVID-19 patients in the district.

Bengaluru, Mar 5: The Karnataka government has advised city-based companies to allow their employees to work from home if they have flu-like symptoms.

"Those employees having flu like symptoms may be allowed to work from home with advice of standard hand hygiene and cough etiquette," the Health Department said in its advisory.

The advisory asked people to avoid non-essential travel to COVID-19 affected countries and refrain from travel to China, Iran, Republic of Korea, Italy and Japan.

"Employees other than those restricted countries arriving directly or indirectly from China, South Korea, Japan, Iran, Italy, Hong Kong, Maccau, Veitnam, Malaysia, Indonesia, Nepal, Thailand, Singapore, Taiwan, the UAE and Qatar must undergo medical screening at airport entry," the advisory read.

The government advisory also mandated employees arriving through all international flights entering lndia from any port to furnish duly filled self-declaration form, including personal particulars - phone numbers and address in India, and travel history to health officials and immigration officials.

It also appealed to promote regular and thorough hand washing at work places and keeping sanitising hand rub dispensers (alcohol-based) in prominent places and provide access to places where staff can wash their hands with soap and water.

Companies have been asked to promote good respiratory hygiene and ensure the availability of surgical masks and paper tissues at workplaces only for those who develop a running nose or cough at work along with closed bins for their hygienic disposal.

Meanwhile, the Bruhat Bengaluru Mahanagara Palike Commissioner B H Anil Kumar chaired a meeting on Wednesday regarding the preparedness to deal with coronavirus.