The disease-germs have spread.
an antidiluvian
equipment that prevents the spread of infection
anti-cholera inoculation
the incubation period―the latent period
an antidiluvian
anti-cholera inoculation
equipment that prevents the spread of infection
the incubation period―the latent period
an antidiluvian
equipment that prevents the spread of infection
The disease-germs have spread.
the immune system
the incubation period―the latent period