中国大学MOOC: Smallpox can be effectively prevented by _______.

‎Smallpox can be effectively prevented by _______.‎ A: vaccines B: penicillin C: antibiotics D: vitamines

______ has been ended worldwide. A: Polio B: Measles C: Rubella D: Smallpox

The WHO provides leadership for targeted global health initiatives such as the successful campaign which led to the elimination of smallpox _________.

The first infectious disease that has been eradicated is ( ). A: Measles B: Poliomyelitis C: Smallpox D: Chickenpox

The first successful vaccine was against ____ A: Cowpox B: Smallpox C: Fowl cholera D: Anthrax E: Rabies

1. Which is the first vaccine? A: Smallpox vaccine B: Measles vaccine C: mumps vaccine D: Rubella vaccine

The fear of smallpox, which terrorized the eighteenth century, has no analogy today. A: occurrence B: remnants C: witnesses D: parallel

中国大学MOOC: Today, smallpox, polio, typhoid and measles are no longer common because most people have been protected by _______.

Which of the following is the first infectious disease exterminated<br/>by human through vaccination? ( ) A: Smallpox B: poliomyelitis C: HCV D: SARS-CoV