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viral infection

The disease-germs have spread.

an attenuated virus

to be infected

infection

the dissemination of disease-germs

an acutely debilitating virus

a condition of being free of any virus

tending to destroy viruses

a virus called {rotavirus}

anti‐virus software

a viral infection

an enterovirus of the echovirus type, sometimes causing mild meningitis

a filterable virus

be infected with a computer virus

relating to or caused by a virus

the medium―the vehicle―of disease-germs

the incubation period―the latent period

a warning signal

a storm warning

a signal to warn of danger

a caprine strain of virus

a fire-alarm

a storm signal

a storm warning

a gale warning

guard against infection

Give warning

a warning to be ready for danger

a smog alert