Rhesus macaques that are vaccinated against SARS-CoV-2 are protected from severe disease and probably transmit very little virus when infected with SARS-CoV-2 one year later.
A study of sexual transmission of Zika virus among mice (link to paper) demonstrates beautifully that viral nucleic acid detected by polymerase chain reaction (PCR) is not the same as infectious virus. Male mice were infected with Zika virus and then mated with female mice. Efficient sexual transmission of the virus from males to females was observed. This …
