What do we know about the virus that causes Covid-19? Its diameter is about one-900th of the width of a human hair. It is more infectious than the flu and appears to kill people at a much higher rate. It has taken the lives of more than a quarter of a million around the world, including at least 78,000 in the United States.
What do we know about the virus that causes Covid-19? Its diameter is about one-900th of the width of a human hair. It is more infectious than the flu and appears to kill people at a much higher rate. It has taken the lives of more than a quarter of a million around the world, including at least 78,000 in the United States.
