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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 27: A yet incomplete state-wide survey has revealed that there are over 53.99 lakh households vulnerable to the infection in Karnataka. The survey is being conducted by the government to find COVID-19 vulnerable population particularly with comorbidities and cases like SARI and ILI.

The survey, which is 67.16% complete so far, finds 1.37 lakh households across Karnataka have people with comorbid conditions, excluding a further 13,341 households with symptoms of Influenza Like Illness (ILI), Severe Acute Respiratory Infection (SARI) and Covid-19.

Over 48 lakh households have senior citizens, who on account of their age are at highest risk of death from the disease.

Munish Moudgil, Director of the State COVID War Room, clarified that households could have multiple types of vulnerable people. According to the survey data (which is dated May 26), Kalaburagi and Bengaluru Urban have the highest cases of SARI, ILI with 1,902 households and 1,703 households respectively, although these numbers are likely to rise, as the survey is still incomplete in these districts. 

A BBMP source said that 68% of the survey has been completed in the city, but the data has not been logged yet. The number of SARI/ILI cases is next highest in Shivamogga with 1,217 households, Mysuru with 1,200 and Davangere with 1,178.

The government regards SARI and ILI as indicators of coronavirus and on April 17, had passed an order instructing healthcare workers to test people with these conditions for the coronavirus. Consequently, 51 COVID-19 cases were discovered by testing people with these symptoms.

Belagavi, meantime, has reported the highest incidents of households with comorbid conditions with 12,427 identified so far, followed by Mandya with 9,289, Kalaburagi with 8,311, Shivamogga with 8,140 and Bengaluru Urban with 7,562. Importantly, 3,45,443 vulnerable people have been identified in Bengaluru Urban within 28.26% of data logged in so far.

New Delhi, Jun 16: The class 10 and 12 students of the CICSE board can choose not to appear for pending board exams and be marked as per their performance in pre-board exams or internal assessment, according to top officials.

The board had also submitted the proposal before the Bombay High Court on Monday in response to a petition filed by a parent seeking directions to the authorities to cancel exams in view of the spike in COVID-19 cases.

According to Gerry Arathoon, Chief Executive and Secretary, Council for the Indian School Certificate Examinations (CISCE), the students will have to communicate their option to their respective schools by June 22.

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The exams which were postponed due to the lockdown to contain the spread of coronavirus, are now scheduled to be conducted from July 1 to 14. However, several parents have been demanding the exams be scrapped.

"The students will be given two options---they either appear for the rescheduled exams or choose to have their results based on their performance in the pre-board exams or internal assessment. The option will be available only for the pending exams, the result of the subjects for which exams were already conducted, will be calculated as per performance in the exam only," Arathoon said.

The board also clarified that the students will not be entitled to make a subject-wise choice between the two options for pending exams.

Unlike the Central Board of Secondary Education (CBSE), which will only be conducting exams in 29 subjects crucial for promotion and admission to higher educational institutions, the CISCE will be conducting all pending exams.

The pending CBSE exams are scheduled from July 1 to 15. The schedule for the board exams has been decided in order to ensure that they are completed before competitive examinations. While the engineering entrance exam JEE-Mains is scheduled to be held from July 18 to 23, the medical entrance exam NEET is scheduled for July 26.

While the CBSE has given the option to not appear for pending board exams for differently-abled students, it has canceled the examinations for its around 250 schools situated abroad and has adopted the criteria of awarding marks on the basis of either practical exams conducted or the internal assessment marks.

Coronavirus India update: State-wise total number of confirmed cases, deaths on June 16

A group of parents has filed a petition in the Supreme Court seeking a direction to the CBSE to declare results on the basis of tests already conducted, and calculate the total on an average basis with internal assessment marks of the remaining subjects.

Universities and schools across the country have been shut since March 16, when the Centre announced a countrywide classroom shut down as part of measures to contain the COVID-19 outbreak. A nationwide lockdown was announced on March 24, which came into effect the next day.

While the government has eased several restrictions, schools and colleges continue to remain closed.

According to Home Ministry guidelines, there will be no exam centres in containment zones.

"Wearing of face masks by teachers, staff and students will be mandatory. There shall be provisions of thermal screening and sanitiser at the centres and social distancing rules will have to be followed at exam centres. Special buses may be arranged by states and UTs for transportation of students to exam centres," the Home Ministry has said.