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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, Jun 29: Bengaluru continued to see a sharp spike in covid- 19 cases as 738 more people tested positive on Monday that took the city's tally to 4052 of which 3427 is active.

The surge in Bengaluru pushed up the number of positive cases to 1105 across Karnataka. The total number of cases in Karnataka now stands at 14,295 of which 6382 are active.

The death toll stood at 230 as 19 more people died in the 24 hours till 5 pm on Monday.

Karnataka, particularly Bengaluru, has seen a sharp rise in cases over the last two weeks indicating the possibility of community transmission and further rise in cases.

Estimates by government authorities project that Karnataka will have around 25,000 cases by mid-August.

R.Ashok, the revenue minister incharge of covid- 19 in Bengaluru on Monday told doctors that they would have to dedicate another six months to contain the virus indicating that authorities were expecting the case count to rise in subsequent days and months.

The city reported over 3,200 cases since 19 June as against 844 cases between 8 March and 18 June.

There are around 500 containment zones in Bengaluru that is likely to have an impact of business and activities in the state's growth capital and its efforts to revive the economy.

The state government on Monday held meetings with private hospitals to increase the number of beds available for treatment of covid- 19.

The number of people in intensive careunits (ICU) jumped to 268.

Bengaluru, May 5: Karnataka Education Minister, S Suresh Kumar on Monday announced that the SSLC exams will be held as soon as possible, the officials have been asked to be prepared.

The guidelines have been given by the Primary Education Minister to all Deputy Directors of Education departments.

"Sanitisers, masks, screening, and all guidelines will be followed at exam halls," said Kumar in a statement.

Meanwhile, Karnataka has reported 651 COVID-19 positive cases so far, said State Health Department said on Monday.