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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.

Bengaluru, Mar 31: Venkara Raghava, a software engineer from Bengaluru, who was infected with the coronavirus has recovered and is currently "doing perfectly well".

"I am doing perfectly well now. I had travelled to Los Angeles via Heathrow airport and that is when I came in contact with many travellers. I might have picked up the infection there," Raghava told news agency.

It was in Los Angeles when he started getting a 'low-grade fever' which led him to prepone his flight to Bengaluru. "When I landed back in Bengaluru on March 8, I had a fever and I isolated myself. The same day I went to a hospital where my travel history was taken and I tested positive for COVID-19", he said.

The next day, he was admitted to the isolation centre. His entire family was also tested but the results came back negative.

When asked about what does suffering from COVID-19 feel like, he responded that it was a like a regular viral fever and was "nothing to be scared of". "The fever is very grinding, and since my childhood, I never had a fever. I had a fever for almost 15 days consistently 100 degrees (F)," he said.

About his experience at the isolation centre, he said that it was an experience unlike that of a hospital. "At the isolation centre, one has to take care of themselves, unlike a hospital where doctors and nurses take care of the patient. I had to put a wet cloth on myself and you cannot overdose yourself with Calpol or Paracetamol," he said.

For him, "The tough times are now over" and now he has fully recovered but in the process, he ended up losing about five kilograms. "After the fifteenth day when I woke up with no fever, they took a test for the nose and the throat and it came back negative," he recalled, and on March 22, he was set free.

For one week, he has been in self-quarantine at home "being completely watchful" that the symptoms do not reoccur.

The number of total coronavirus cases reached 1,251 on Monday. There are 1117 active cases in the country, according to the Ministry of Health and Family Welfare.

Mumbai, Jul 11: Bollywood veteran Amitabh Bachchan announced on Twitter late on Saturday that he tested positive for the novel coronavirus infection.

Taking to Twitter to announce the news, he said, "I have tested CoVID positive... " He added that family and staff had also undergone tests while Bachchan has been shifted to a hospital. 

Bachchan ended his tweet saying, "All that have been in close proximity to me in the last 10 days are requested to please get themselves tested !"

T 3590 -I have tested CoviD positive .. shifted to Hospital .. hospital informing authorities .. family and staff undergone tests , results awaited ..
All that have been in close proximity to me in the last 10 days are requested to please get themselves tested !

— Amitabh Bachchan (@SrBachchan) July 11, 2020

Bachchan, who was last seen in Gulabo Sitabo that released on OTT platforms, will be seen in Ranbir Kapoor-starrer Bhrahmastra.