Even though the vaccines may protect people from showing symptoms, those vaccinated could remain susceptible to infection, which is why officials are urging those who have been recently vaccinated to...Even though the vaccines may protect people from showing symptoms, those vaccinated could remain susceptible to infection, which is why officials are urging those who have been recently vaccinated to continue to wear masks and maintain social distance. Congressional coronavirus cases show that one vaccine dose does not immediately protect against infection | The Seattle Times