All whose virus disappeared completely had been infected for three years or less.

Players who are unsuccessful in doing this will be infected for a limited amount of time.

Subjects will have been infected for varying lengths of time, which may affect these findings.

What responsible government could assume the burden of falsely telling nine people they were infected for each true infection identified?

Some scientists say bats are its most likely host because they can be infected for long periods without showing symptoms.

Only a small number of seedlings need to be infected for the virus to spread rapidly.

Now 46, he has been infected for more than half his life.

Pregnant women infected for the first time by Toxoplasma may pass it to their unborn children.

No human being is known to have been infected by smallpox for close to a quarter of a century.

You may be infected for months, even if you don't have symptoms.