On Onam, PM says nation stands with Kerala

New Delhi, July 4: India on Friday reported its highest single-day spike of COVID-19 cases with 22,771 cases reported in the last 24 hours, said the Union Ministry of Health and Family Welfare.

With these new cases, India's coronavirus cases tally has gone up to 6,48,315, out of which there are 2,35,433 active cases in the country and 3,94,227 cases have been cured/discharged or migrated.

As many as 442 deaths due to COVID-19 have been reported in the last 24 hours taking the number of patients succumbing to the deadly virus across the country to 18,655.

As per the Union Health Ministry, Maharashtra -- the worst affected state due to COVID-19 -- has a total of 1,92,990 cases which is inclusive of 8,376 deaths. Meanwhile, Tamil Nadu, the second worst-affected state, has a total of 1,02,721 cases and 1,385 fatalities. Delhi's tally of coronavirus cases stands at 94,695 which is inclusive of 2923 deaths due to the virus.

The Centre said that the recovery rate has further improved to 60.80 per cent. The recoveries/deaths ratio is 95.48 per cent : 4.52 per cent.

The Indian Council of Medical Research, earlier on Saturday, said that the total number of samples tested up to July 3 is 95,40,132, out of which 2,42,383 samples were tested yesterday.

Washington, Jun 30: Researchers in China have discovered a new type of swine flu that is capable of triggering a pandemic, according to a study published Monday in the US science journal PNAS.

Named G4, it is genetically descended from the H1N1 strain that caused a pandemic in 2009.

It possesses "all the essential hallmarks of being highly adapted to infect humans," say the authors, scientists at Chinese universities and China's Center for Disease Control and Prevention.

The researchers then carried out various experiments including on ferrets, which are widely used in flu studies because they experience similar symptoms to humans -- principally fever, coughing and sneezing. 

G4 was observed to be highly infectious, replicating in human cells and causing more serious symptoms in ferrets than other viruses.

Tests also showed that any immunity humans gain from exposure to seasonal flu does not provide protection from G4.

According to blood tests which showed up antibodies created by exposure to the virus, 10.4 percent of swine workers had already been infected.

The tests showed that as many as 4.4 percent of the general population also appeared to have been exposed.

The virus has therefore already passed from animals to humans but there is no evidence yet that it can be passed from human to human -- the scientists' main worry.

"It is of concern that human infection of G4 virus will further human adaptation and increase the risk of a human pandemic," the researchers wrote.

The authors called for urgent measures to monitor people working with pigs.

"The work comes as a salutary reminder that we are constantly at risk of new emergence of zoonotic pathogens and that farmed animals, with which humans have greater contact than with wildlife, may act as the source for important pandemic viruses," said James Wood, head of the department of veterinary medicine at Cambridge University.

A zoonotic infection is caused by a pathogen that has jumped from a non-human animal into a human.