The smallpox virus was spread by which means?

direct contact with pustular material

Consumption of contaminated water

transmitted through insect vector

Which is a correct features for EFFECTIVE vaccines.

Protection against illness must last for several years

Vaccine must not itself cause death although it can cause severe illness

Vaccine can be costly and administered by any means necessary, that includes anal tablets, gross

Vaccine is not required to protect against illness resulting from exposure to live pathogen

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1The smallpox virus was spread by which means?
1. AConsumption of contaminated water
2. Bdirect contact with pustular material
3. Cinhalation of virus
4. Dtransmitted through insect vector
2Which bacterial disease was known for causing swelling of the lymph node
1. AMeasles
2. Bpolio
3. Csmallpox
4. Ddiphtheria
3Herd immunity is impaired because unvaccinated individuals tend to be found in clusters for cultural or medical reasons?
1. AVerdadero
2. BFalso
4Which is a correct features for EFFECTIVE vaccines.
1. AProtection against illness must last for several years
2. BVaccine must not itself cause death although it can cause severe illness
3. CVaccine can be costly and administered by any means necessary, that includes anal tablets, gross
4. DVaccine is not required to protect against illness resulting from exposure to live pathogen