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Thiruvananthapuram, May 22: Kerala reported its highest rise of COVID-19 cases in a single day with 42 new cases on Friday of which 23 returned from other states and 17 from abroad.

Addressing media persons, Kerala Chief Minister Pinarayi Vijayan said that of the new cases, 23 have come back from other States (Maharashtra-21, Tamil Nadu-1 and Andhra Pradesh-1) and 17 have returned from abroad (Kuwait-7, UAE-5, Saudi Arabia-2 and Qatar-2). Two are cases of local transmission including one health worker in Kasargod.

"A total of 12 persons from Kannur district, seven in Kasargod district, five each from Kozhikode and Palakkad districts, four each in Thrissur and Malappuram districts, two from Kottayam district, and one each in Kollam, Pathanamthitta and Wayanad districts are those who have tested positive, " he said.

Meanwhile, two patients under treatment for Coronavirus in Malappuram district have tested negative today. The total number of confirmed Covid-19 cases in Kerala is 732 and 216 patients are now under treatment in different hospitals. Kannur and Malappuram districts have 36 patients each, followed by 26 in Palakkad district, 21 in Kasargod district, 19 in Kozhikode district and 16 in Thrissur district.

The Chief Minister said that a 73-year-old woman had died in Thrissur district. She had recently returned from Mumbai.

There are 84,258 persons under observation across the state, 83,649 are quarantined at their homes or institutional quarantine centres and 609 are isolated in hospitals.

A total of 162 persons were admitted to hospitals today.

Till now, 51,310 samples have been sent for testing and 49,535 samples have been confirmed without any infection. Apart from this, as part of sentinel surveillance of high-risk groups, 7,072 samples were tested separately and out of these, 6,630 samples have been confirmed with no infection.
No new place was declared as hotspot today and there are 28 hotspots in the state.

So far, 91,344 people have come to the state from foreign countries and other states by road, sea and air.

Expressing concern over the rising numbers, the Chief Minister said, "The increase in numbers is a serious warning. Our COVID-19 preventive measures need to be enhanced. More people are expected to come back and we will ensure proper testing, treatment and care to all. Serious patients are among those who are coming back."
"We will ensure additional facilities including ventilators in hospitals to accommodate more in-patients. Huge rush is being seen at some places. People should observe more self-restraint or else all efforts will become ineffective," he added.

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.