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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.

New Delhi, Jan 20: Security has been beefed up at airports across the country after a suspicious bag was found at the Mangaluru airport on Monday.

According to Central Industrial Security Force (CISF), which guards the airports in the country, a man was captured in the CCTV dropping the bag inside Mangaluru airport.

According to the CISF DIG Anil Pandey, traces of improvised explosive device (IED) have been found from the bag.

"According to CCTV footage, a suspect kept the bag at Mangaluru airport and was then seen leaving in auto while concealing his face. The suspected object was detected timely and local bomb disposal team is working on its disposal," DIG Pandey told media.

"We have found traces of IED from a bag lying at a ticket counter in Mangaluru airport, we have safely evacuated it," DIG Pandey told media.

According to sources, initial investigations have revealed that the bag contained some type of black powder.

"Initial investigation has revealed that the bag contained a black powder which seems to be explosive, though it is yet to be cleared what kind of explosive it is," sources claimed.

"After we found the suspicious bag at Mangaluru airport, a security drill has been initiated at all the airports and CISF staff have been asked to beef up security," DIG Pandey said.

Also Read: IED recovered from Mangaluru Airport defused safely; 3 teams formed to nab suspect: Top cop

Mangaluru, Feb 12: More than 7,000 people at Mangalore International Airport (MIA) and over 1,000 at the New Mangalore Port (NMP) have undergone thermal screening for the novel coronavirus in the past few days, a taluk health official said on Wednesday.

A few more ships are scheduled to arrive at the port and all precautionary measures to check the ship’s passengers and crew are ready, he said.

Soon after a positive case of deadly pathogen surfaced in Kerala, the district health officials here actively started monitoring all entry points in the bordering district. 

Apart from Mangaluru, there is bus connectivity to Puttur, Sullia, Bantwal, Dharmasthala and Subrahmanya from Kerala. More than eight to 10 trains arrive at Mangaluru daily from Kerala.

Hence, it is impossible to take up screening of all the vehicles arriving from Kerala, sources in District Health and Family Welfare said.