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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.

Udupi, May 17: A total of 1,460 migrant labourers left for Uttar Pradesh from Indrali Railway Station in Udupi in Shramik Special train on Sunday.

This is the first train to ferry migrant labourers from Udupi. As many as 236 from Karkala, 323 from Kundapura, 901 labourers from Brahmavar, Kaup and Udupi left for their native villages.

More than 2,000 labourers had gathered at the railway station and only 1,460 labourers received tickets to travel.

Those who did not receive tickets were disappointed and got into heated arguments with the officials.

The labourers were promised that they will receive tickets to another train, that would depart from Udupi before May 20. One bogie of the train was reserved for pregnant women, women and children.

As many as 1,712 from Jharkhand, 770 from Odisha, 977 from West Bengal, 1,600 from Bihar, 379 from Madhya Pradesh, 280 from Chattisgarh, 110 from Uttarkhand, 379 from Rajasthan had registered on Seva Sindhu portal.

Additional Deputy Commissioner B Sadashiva Prabhu said that there are plans to make arrangements to send migrant labourers from UP, Uttaranchal, Madhya Pradesh and Jharkhand.

Bengaluru, Jul 6: As COVID-19 cases continue to surge in Karnataka, more than 20 police stations were sealed in Bengaluru after many policemen tested positive for novel coronavirus.

"Since the last few weeks, the number of COVID-19 cases in the police department has increased as many of the policemen have tested positive, so that's the reason why the police have taken a decision to close police stations," Bengaluru Commissioner of police Bhaskar Rao said.

He added, "However, people can lodge their complaints and other issues can be solved in help desks launched outside premises of the police station. Most of the areas where positive cases found in the police station are been sealed down for the safety of the people and sanitised them."

However, some of the police stations would be functional from outside the premises.

Commercial Street, Cottonpete, Chickepete, KG Halli traffic police station are among the few stations closed due to scare of the coronavirus spread after some policemen tested positive in particular stations.

Rao further said that the traffic police, civil police along with home guards have been given safety gloves, face masks, and sanitizers along with face covers by the department of police.

According to the Union Health Ministry, 23,474 COVID-19 cases have been reported in the state, as of Monday.