Japanese woman reinfected with coronavirus weeks after initial recovery

TOKYO - A woman working as a tour bus guide in Japan tested positive for the coronavirus for a second time, Osaka's prefectural government said on Wednesday , the first person in the country to be reinfected amid growing concerns about the spread of the infection.

The woman, a resident of Osaka in western Japan, tested positive on Wednesday after developing a sore throat and chest pain, the prefectural government said in a statement, describing her as being in her forties. She first tested positive in late January and was discharged from the hospital after recovering on Feb 1, according to the statement.

"Once you have the infection, it could remain dormant and with minimal symptoms, and then you can get an exacerbation if it finds its way into the lungs," said Philip Tierno Jr., Professor of Microbiology and Pathology at NYU School of Medicine. Japan has changed its strategy in combating the contagion, seeking to slow its spread and minimise the number of deaths.

Uncertain whether in the first place when 'cured' whether really so. If viral load was low but not entirely gone may have missed.

Problems with diagnostic protocol? - US CDC found their test kits were 'faulty' with optional validation. Is this fault in other test kits? - Covid-19 is a lower respiratory tract infection. Is conventional nasal swab sensitive enough if mucus expulsion is temporarily suppressed?

“'I'm not certain that this is not bi-phasic, like anthrax,' he said, meaning the disease appears to go away before recurring.” This is very concerning.

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