Rich haul of gold seized at Mangaluru Airport in January

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.

Bengaluru, May 2: The Centre’s classification of districts created confusion in Karnataka as the state’s own categorisation deviates significantly from the health ministry’s list.

For instance, the Centre put the number of districts in the red zone in state at three, while the state Covid-19 war room puts it at 14. Bengaluru Urban and Mysuru figure in the red zone in both lists. While Bengaluru Rural with zero active cases on May 1makes it to the Centre’s red-zone list, it is in the orange zone according to the state.

In addition to these two, the state classifies Belagavi, Kalaburagi, Vijayapura, Bagalkot, Mandya, Bidar, Dakshina Kannada, Chikkaballapura, Dharwad, Gadag, Tumakuru and Davanagere as red-zone districts.

State Covid war-room authorities said they would take a look at the Centre’s criteria for classification and take a call. Besides, incharge Munish Mudgil pointed out that states are allowed to make additions to the red and orange zones. According to the Centre’s list, Karnataka has 13 districts in the orange zone and 14 in the green zone.

Sudan said, “the districts were earlier designated as hotspots or red zones, orange zones and green zones primarily based on the cumulative cases reported and the doubling rate. Since recovery rates have gone up, the districts are now being designated across various zones duly broad-basing the criteria.

This classification takes into consideration incidence of cases, doubling rate, extent of testing and surveillance feedback. A district will be considered under the green zone if there are no confirmed cases so far or if there is no reported case in the past 21 days.”

Ballari, Apr 18: Hosapete town in Ballari district of Karnataka gasped in disbelief as it turned out that 11 members of one single family are positive for the coronavirus.

The whole town has been declared a containment zone and is being surveilled 24X7.

The family includes seven members whose tests returned positive today, three who tested Covid-19 positive on March 30 and one other member subsequently.

The seven who tested positive today had been negative when they were earlier tested along with the others.

They have all now been shifted to isolation wards at the District Hospital in Ballari.

Including this family of 11, Ballari has 13 positive cases so far, with one case each reported from Ballari and Siraguppa towns.

Startled by this sudden upsurge from Hosapete, the district administration has set up 16 fever clinics to screen people and six COVID care centres to treat positive cases. There are two dedicated COVID hospitals, one at Ballari and another at Torangallu in Sandur.

A team of psychological counsellors have been put on duty to provide support to the patients at the isolation centres.