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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.

Mangaluru, Apr 26: City Police Commissioner P S Harsha on Sunday said that the news about the implementation of seal down in some wards of Mangaluru city is fake and urged the public not to pay any heed to it.

Taking to twitter, Mr Harsha wrote, ''Some miscreants are floating some old speculative…TV news reports of seal down in some wards of Mangaluru city. It’s fake news.....Don’t Heed to fake news.''

Bengaluru, Jun 12: Karnataka Medical Education Minister K Sudhakar on Friday said experts have indicated a surge in coronavirus cases in the state after August 15 and the government was taking all precautionary measures in that direction. Speaking to reporters in Ballari, Sudhakar said, "About 97 percent of over 3,000 active cases in the state are asymptomatic.

Experts after studying the developments in other countries and states have said that there will be a surge in infections after August 15."

He said the government was taking all precautionary measures in that direction.

 As of June 11 evening, cumulatively 6,245 COVID-19 positive cases have been confirmed in the state, which includes 72 deaths and 2,976 discharges, the health department's bulletin said.

It said, out of 3,195 active cases, 3,185 patients are in isolation at designated hospitals and are stable, while 10 are in ICU.

Meanwhile, in a tweet pointing out that nearly 60 per cent of the COVID cases in the country are from 10 cities, Sudhakar said, despite being the fourth most populous city in the country Bengaluru has been successful in containing its spread.

"Nearly 60% of total COVID-19 cases in India are found in 10 cities. Despite being 4th most populous, Bengaluru has been successful in containing spread of virus.

I urge people to keep up the fight, continue vigil & together with #CoronaWarriors we can defeat the virus," Sudhakar tweeted.

Bengaluru that does not figure in the list of 10 cities shared by the Minister has reported 581 coronavirus cases till last evening, out of which 258 are active.