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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.

More and more Indians have become better prepared in the last one month, as far as stocking of their ration, medicine or money is concerned, according to the IANS-CVoter COVID-19 Tracker.

With the second leg of the lockdown half way through and Prime Minister Narendra Modi saying it's a long haul, 57.2% respondents said they have less than three weeks of stock while 43.3% said they have a stock that will last beyond that

However, if one breaks into weeks, most respondents said they are prepared for a week's time. 24.5% respondents said they have ration, medicine or money to last a week. This is closely followed by 21.9 % respondents saying they are ready for a month.

Meanwhile, 20.4 % said they are ready for a couple of weeks. There are 15.8 % who said they are ready for more than a month with food, ration and medicine. A tiny 5.6 % said they are ready with three weeks of stock.

However, there is 12.3% who still seem to live on the edge with less than a week's preparation.

But, the biggest takeaway from the IANS-CVoter COVID-19 Tracker is that in the last one month, a massive segment of society realised that the fight is long and the preparation should also be to last that long.

o put things into context, on March 16 when the tracker started, a whopping 77.1% said they have stock to last for less than a week. More than a month later on April 21, that number jumped to just 12.3%, which essentially means, people have become better prepared for a long-hauled lockdown period.

Similarly, on April 21, a sizable 21.9% respondents claimed they are ready with ration and medicine that will last them a month. On March 16, not even one respondent could claim they have a month's stock. In fact till March 22, just ahead of the announcement of the first lockdown, no respondent the IANS-CVoter tracker said that they have a month's preparation.

Similarly, when the tracker started, 9.9% said they simply ‘don't know'. As on April 21, that number is a big zero.