An effective nasal vaccine could stop the virus that causes COVID-19 right at its point of entry. But devising one that works has been a challenge for researchers.
Questions remain about COVID-19 infection, transmission, treatment and recovery. Here are answers to some common questions about the coronavirus pandemic.
An anthropologist works in American Samoa, taking advantage of the island’s longstanding tattoo culture to tease out the effects tattoos have on the body’s immune function.