Question

Influenza vaccines are made up of:

		killed microorganisms
		toxins produced by microoganisms
		parts of microorganisms
		none of the above

Answer 1

Influenza vaccines are made up of killed microorganisms.

Influenza vaccines are made by inactivating the microorganisms using heat or chemicals such as formaldehyde or formalin. It can destroy the pathogen's ability to replicate but it keeps intact so that the immune system can still recognize it.

Toxins produced by micro organisms such as tetanus vaccine. Symptoms are not caused by the microorganism clostridium tetani. But it is caused by a neurotoxin called tetanospasmin.

Parts of microorganisms is not a component of influenza vaccine because influenza vaccine is made up of killed micoorganisms.

None of the above is not correct because the answer is provided in the option. Therefore it is not a relevant answer