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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 20: The Karnataka Health Department has issued guidelines on the admission of COVID-19 patients in private hospitals after clinical assessment, mandating that the district surveillance officer (DSO) should be first informed to initiate further procedures, an official said on Friday.

"A health team sent by the DSO should visit the home or hospital where the patient is staying. The team should conduct a rapid assessment of his or her health condition," said Karnataka's Additional Chief Secretary Jawaid Akhtar.

In the rapid health condition assessment, the team should first check the patient's body temperature, followed by SpO2 (oxygen saturation) level and confirm if there are any comorbidities such as hypertension, diabetes, tuberculosis, HIV, cancer, stroke etc.

Depending on the health condition of patients, Akhtar said, two categories have been made.

"Those who have body temperature greater than 37.5 degrees Celsius, SpO2 level below 94 percent, elderly (above 60 years) and suffering from known comorbid conditions should be taken to a dedicated Covid hospital (DCH)," he said.

"All other patients, even if older but not suffering from co-morbidities, those below 60 and suffering from co-morbidities and asymptomatic cases should be taken to a dedicated Covid health centre (DCHC) or a private hospital as opted by the patient," he added.

Private hospitals have been asked to pitch in due to the rising number of cases in Karnataka. Currently, there are 2943 active cases in the state after 337 cases were reported on Friday.

"The patients are assessed clinically and evaluated at DCHCs or private hospitals with appropriate diagnostic tests. After evaluation, if the patients are asymptomatic, they are shifted to a COVID Care Centre (CCC) for further management," said Akhtar.

CCCs are expected to be equipped with ventilated rooms, pulse oximeters, handheld thermal scanners and blood pressure apparatus.

A nurse has to be present round the clock for every 50 patients and should visit each patient twice a day for assessment whereas the medical officer has to visit the CCC once a day. He should also be available on call in case of an emergency.

Staff serving food and others should wear personal protective equipment and an N-95 mask. Explaining the procedures at DCHCs, Akhtar said general examinations for medical conditions like body temperature, BP, pulse, oxygen saturation and urine output should be in place.

Investigations such as complete blood count, fasting blood sugar, random blood sugar, liver function tests, renal function tests, ECG and chest X-ray facilities should be available.

"DCHCs should ensure that above examinations are over in an orderly timeline of 24 hours and depending on the examination, the patient is continued to be lodged at the DCHC or sent to DCH or CCC," said the senior officer.

Likewise, the discharge policy should be done as per the protocols issued by the Health Department from time to time.

The Karnataka government is yet to fix an upper limit on the cost of treating COVID-19 patients in private hospitals. While reports indicated that this could be capped at Rs 5200 per day, health officials are yet to specify this is the case. Private hospitals in the state have asked the government to take a collaborative approach in deciding the fixed cap on treatment cost.

Bengaluru, May 9: With 41 new cases of COVID-19 reported on Saturday, the total number of positive cases in Karnataka has reached 794, said the state Health Department.

Out of the total number, 386 are discharged and 30 patients have passed away. The total number of active cases now in Karnataka is 377.

The total number of positive coronavirus cases across the country is 59,662, including 39,834 active cases.

Till now, 17,846 patients have been cured and discharged and 1,981 deaths have been recorded in the country, as per the data provided by the Union Ministry of Health and Family Welfare.