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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.

Bengaluru, May 16: At least 23 new COVID-19 positive cases have emerged in the past 19 hours, raising Karnataka''s tally to 1,079, a health official said on Saturday.

"New cases reported from Friday 5 p.m. to Saturday noon are 23," said the official.

Among the 1,079 cases, 548 are active and isolated in designated hospitals across the state, 494 patients got discharged and 36 died of the virus.

In the past 19 hours, cases spiked in Benglaluru Urban, the place hosting the highest number of coronavirus cases in the state.

Of the new cases, Bengaluru Urban reported 14 cases, followed by 3 in Hassan and Mandya, Ballari, Bagalkote, Davangere, Dharwad and Udupi, 1 each.

All the 14 cases, men, from Bengaluru Urban were secondary contacts of positive case 653.

All Hassan, Dharwad and Bagalkote cases had a history of inter-state travel to Mumbai, Maharashtra, India''s largest sufferer of Covid.

A 46-year-old man from Ballari had a travel history to Ahmedabad in Gujarat, another major COVID-19 hotspot state in India.

A 40-year-old man from Mandya had inter-district travel history to Kolar and Bengaluru.

A 1-year-old infant girl from Udupi had international travel history to Dubai.

Among the new cases, 15 are contacts of earlier cases.

Of the all cases, 20 are men and three women.

Only four of the 23 cases are above 50 and 18 below 40.

Of the 1,079 cases, 12 per cent patients were senior citizens, 66 per cent men and 34 per cent women with a discharge rate of 44 per cent.

Mangaluru, May 8: Twenty-two students of Jawahar Navodaya Vidyalaya (JNV), Mudipu on the outskirts of Mangalur city, stranded in Uttara Pradesh due to lock-down reached the campus on Friday morning.

These Class 9 students (12 girls and 10 boys) had studied at JNV Amroha, Uttar Pradesh, as part of an exchange programme, 21 students of Amroha campus studied in Mudipu. 

While Amroha students could return after completing their studies, the Mudipu students were among many JNV students who were unable to return because of the lock-down.

JNV Mudipu Principal V Srinivasan said the 22 students, along with escorts, reached the campus at 7.15 a.m today.