The pandemic has exacerbated a decline in immunization rates, which fell by 65% in some states in 2020
Studies show the quality and importance of preprints (scientific papers shared online as soon as they are written) related to the novel coronavirus
Humans have transmitted SARS-CoV-2 to animals, at least two of which have passed the virus onto other people
Clinical trials begin for broad-spectrum vaccines designed to offer protection against multiple coronaviruses
