Nevertheless, inoculation became known as a way to prevent smallpox.

The farmers told him that cowpox prevented smallpox.

The earliest procedure used to prevent smallpox was inoculation (also known as variolation).

Vaccination to prevent smallpox was soon practiced all over the world.

The vaccine can prevent smallpox up to four days after exposure to the virus.

The inscription also carried advice on hygiene measures to prevent smallpox.

Vaccinations to prevent smallpox have not been routinely given in this country since 1972.

Vaccination offered the public a harmless method of preventing smallpox.

Although a vaccine can prevent smallpox, no known drugs can cure the disease after it has developed.

The vaccinia virus formed the basis of the vaccine that was used since 1796 to prevent smallpox.