China Covid-19 ‘superspreader’ linked to 102 infections

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The individual, who worked as a salesman promoting health products to the elderly, had traveled from his home province of Heilongjiang to neighboring Jilin province, bringing the virus with him.

Authorities claim he unknowingly spread the virus among elderly residents for several days before he was tracked down by health officials as a close contact of a confirmed case.

“The superspreading phenomenon occurred in our province mainly because when the superspreader was discovered, he was still in the early phase of his infection and had relatively strong ability to shed the virus,” Zhao Qinglong, an official with the Jilin provincial … Read the rest

Four more Australian Open participants infected with COVID-19

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MELBOURNE (Reuters) – More players were forced into hard quarantine ahead of the Australian Open with officials confirming on Monday that four additional participants, including an athlete, tested positive for COVID-19 among those arriving in Melbourne.

Health authorities in Victoria state have now reported nine infections among passengers who arrived on charter flights for the Feb. 8-21 Australian Open and officials said more cases may come to light as testing continues.

“All four are associated with the tennis, and they’re all tucked away safely in hotel quarantine,” Victoria state premier Daniel Andrews told reporters of the new cases.

Passengers on

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Past SARS-CoV-2 Infection Mostly Protects Survivors

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Immune responses from a previous SARS-CoV-2 infection reduce survivors’ risk of reinfection by more than 83 percent for at least five months, according to preliminary data from a study of more than 20,000 UK healthcare workers published by Public Health England. The researchers caution that people previously infected may still be able to transmit the virus.

“Overall I think this is good news,” Imperial College London epidemiologist Susan Hopkins, a senior medical adviser to Public Health England (PHE), tells The Guardian. “It allows people to feel that prior infection will protect them from future infections, but at the

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Israel Vaccine Data Suggests Decrease in Covid-19 Infection Rate After First Dose

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TEL AVIV—Early data from Israel suggests Covid-19 infection rates began to decrease among a group of vaccine recipients two weeks after they received the first shot of Pfizer Inc. and BioNTech SE ’s vaccine, offering important insights to other countries as they roll out their own campaigns.

The small country—whose roughly nine million population is about the size of New York City’s—has vaccinated nearly a fourth of its population in just under a month, the first country to hit that mark as it fights an upsurge in new infections.

Israel’s largest health-care provider, Clalit Health Services, compared test positivity rates

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1 in 3 in L.A. have been infected by coronavirus, estimates show

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One in three Los Angeles County residents have been infected with the coronavirus since the beginning of the pandemic, according to new estimates by county scientists, an astonishing sign of how rapidly the virus is spreading in the hard-hit region.

The estimate, based on scientific modeling, means officials believe more than 3 million of L.A. County’s 10 million residents have been infected with the coronavirus, including nearly 13,000 who have died.

That’s more than triple the cumulative number of coronavirus cases that have been confirmed by testing. Officials have long believed that testing only captures a certain percentage of

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