______ has been ended worldwide.
A: Polio
B: Measles
C: Rubella
D: Smallpox
A: Polio
B: Measles
C: Rubella
D: Smallpox
举一反三
- 中国大学MOOC: Today, smallpox, polio, typhoid and measles are no longer common because most people have been protected by _______.
- 中国大学MOOC: Today, smallpox, polio, typhoid and measles are no longer common because most people have been protected from them by _______.
- The first infectious disease that has been eradicated is ( ). A: Measles B: Poliomyelitis C: Smallpox D: Chickenpox
- 1. Which is the first vaccine? A: Smallpox vaccine B: Measles vaccine C: mumps vaccine D: Rubella vaccine
- Today, smallpox, polio, typhoid and measles are no longer common because most people have been protected from them by _______. A: anti-neurohomone drugs B: antiviral drugs C: vaccines D: antibiotics