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Feb 22: A 20-year-old Chinese woman from Wuhan, the epicentre of the coronavirus outbreak, travelled 400 miles(675 km) north to Anyang where she infected five relatives, without ever showing signs of infection, Chinese scientists reported on Friday, offering new evidence that the virus can be spread asymptomatically.

The case study, published in the Journal of the American Medical Association, offered clues about how the coronavirus is spreading, and suggested why it may be difficult to stop.

"Scientists have been asking if you can have this infection and not be ill? The answer is apparently, yes," said Dr. William Schaffner, an infectious disease expert at Vanderbilt University Medical Center, who was not involved in the study.

China has reported a total of 75,567 cases of the virus known as COVID-19 to the World Health Organization (WHO) including 2,239 deaths, and the virus has already spread to 26 countries and territories outside of mainland China.

Researchers have reported sporadic accounts of individuals without any symptoms spreading the virus. What's different in this study is that it offers a natural lab experiment of sorts, Schaffner said.

"You had this patient from Wuhan where the virus is, travelling to where the virus wasn't. She remained asymptomatic and infected a bunch of family members and you had a group of physicians who immediately seized on the moment and tested everyone."

According to the report by Dr Meiyun Wang of the People's Hospital of Zhengzhou University and colleagues, the woman travelled from Wuhan to Anyang on Jan. 10 and visited several relatives. When they started getting sick, doctors isolated the woman and tested her for coronavirus. Initially, the young woman tested negative for the virus, but a follow-up test was positive.

All five of her relatives developed COVID-19 pneumonia, but as of Feb. 11, the young woman still had not developed any symptoms, her chest CT remained normal and she had no fever, stomach or respiratory symptoms, such as cough or sore throat.

Scientists in the study said if the findings are replicated, "the prevention of COVID-19 infection could prove challenging."

Key questions now, Schaffner said, are how often does this kind of transmission occur and when during the asymptomatic period does a person test positive for the virus.

Kolkata, Jul 20: As many as 13 migrant workers who came to their native village in West Bengal's Bankura district were denied entry at the quarantine centre by the locals.

As a result, the workers had to set up a tent accommodation at a nearby Beraban forest area and lived together in a single tent there, without adequate food, drinking water and basic facilities.

The migrant labourers came from Rajasthan after four months of COVID-19 lockdown which was imposed nationwide on March 25 to contain the spread of coronavirus.

When they arrived at Jagadalla village in the Bankura district and tried to put up at a village school building for two weeks self-quarantine, angry villagers vehemently protested against their entry fearing Covid infections in their village.

Sources said that local police and panchayat members also failed to make the villagers understand the fact that if the labourers strictly stayed in self-quarantine there would be no chance of any further infection.

"The school is located quite within our neighbourhood. If they stay there and tested positive, they might spread Covid infections in the village. We cannot allow them to stay in the school building," said Aniket Goswami, a villager.