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Consider the following statements regarding mRNA vaccines

They use a copy of a molecule called messenger RNA (mRNA) to produce an immune response.
They introduce a harmless piece of a bacteria or virus into the body, triggering an immune response.
mRNA vaccines require ultracold storage before distribution.

Select the correct statement.

1&2 only

2&3 only

1&3 only

All of the above

Explanation:

Only statements 1&3 are correct.

mRNA vaccines work by using mRNA, or messenger RNA, which is the molecule that essentially puts DNA instructions into action.
mRNA vaccines do not contain any part of a bacteria or virus, but only a piece of mRNA that corresponds to a viral protein.
Some mRNA vaccines require ultracold storage, such as the Pfizer–BioNTech COVID-19 vaccine.
Other mRNA vaccines, such as the Moderna, CureVac, and Walvax COVID-19 vaccines, do not have such requirements.

Hence option 3rd is correct.

By: Shubham Tiwari

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