Coronavirus started spreading in the U.S. in January, CDC says
The coronavirus began quietly spreading in the U.S. as early as late January, the Centers for Disease Control and Prevention reported Friday — before President Donald Trump blocked air travel from China and a full month before community spread was first detected in the country.
The CDC traced the early spread in several ways, including what's called syndromic surveillance of emergency department records, tests of respiratory specimens and analyses of the virus's genetic sequences from early cases. The virus then came into the U.S. from Europe, the CDC reported."The findings do show that in late February, early March, there were several importations of the virus from Europe to California and northeastern United States and possibly elsewhere," Redfield said.
But the CDC said it will likely never be known if the man was the first person in the U.S. with the virus. Now that it's clear COVID-19 can be spread among people who never have symptoms, it's even possible the man was infected by an asymptomatic passenger on the same flight from Wuhan.
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