Rajaa
Hakutulokset: Hakutulos
Rajaa
yksi hakutulos.
Vaccination Against Smallpox
pokkari,
1996,
englanti,
ISBN 9781573920643
The once-dreaded scourge of smallpox has been eradicated through barrier immunization. The eminent scientist Edward Jenner (1749-1823) was a pioneer in demonstrating that …