That was always a risk even before COVID-19. Regular seasonal influenza can be deadly, especially to the elderly. Patients can transmit it to others when they are asymptomatic or presymptomatic. COVID-19 has a longer incubation period and a significantly higher fatality rate but the same fundamentals still apply.
Any of us could have inadvertently killed someone by giving them the flu without even realizing it.
Any of us could have inadvertently killed someone by giving them the flu without even realizing it.