Question

nucleic acid vaccines are very new. in fact there are currently only 2 vaccines of this type approved for use by the fda in humans. these mrna vaccines help prevent the spread of covid 19.
what would be the immune - stimulating ingredient from an mrna vaccine for covid?
only the viruss spike protein created in a lab
a genetically altered virus that has the dna code from the covid virus inside it
the viruss spike protein produced by your own cells
the shell of the virus with its nucleic acid removed

Explanation:

mRNA vaccines work by delivering mRNA (messenger RNA) into cells. The mRNA contains the genetic code for the virus's spike protein. Once inside the cells, the cells use this mRNA as a template to produce the spike protein. This spike protein then acts as an antigen, stimulating the immune system.

• The first option "only the virus's spike protein created in a lab" is incorrect because in mRNA vaccines, the body's own cells produce the spike protein, not a lab - created one (in the context of how the vaccine functions in the body).
• The second option "a genetically altered virus that has the DNA code from the Covid virus inside it" is incorrect as mRNA vaccines use mRNA, not a genetically - altered virus with DNA.
• The fourth option "the shell of the virus with its nucleic acid removed" is incorrect as it does not describe the mechanism of mRNA vaccines.

Answer:

the virus's spike protein produced by your own cells