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A primary reason for needing a new vaccine for influenza each year is that there could be mutation of surface proteins leading to a new outbreak
<h3>What is antigenic drift?</h3>
Antigenic drift is a phenomenon that causes small changes or mutations in the genes of influenza viruses leading to changes in their surface proteins of the virus, which are HA (hemagglutinin) and NA (neuraminidase).
For this reason, new influenza vaccines are produced yearly to alter the effects that may emerge as a result.
Thus, a primary reason for needing a new vaccine for influenza each year is that there could be mutation of surface proteins leading to a new outbreak
Learn more about influenza here:
brainly.com/question/12975693
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Answer:
The correct answer is C.
Explanation:
The respiratory center is divided into 3 main groups, the dorsal respiratory group and the ventral respiratory group, both located in the <u>medulla</u>, and the pontine respiratory group, located in the <u>pons</u>. This last one also divides into two areas: <em>the pneumotaxic and the apneustic center.</em>
During quiet, restful breathing, the dorsal group stimulates the diaphragm and the intercostal muscles for inspiration. Expiration then occurs depending on the elastic recoil of the lungs. When forced expiration is required, the ventral group activates.
Answer:
personality deepth
Explanation:
in order to study peraonallity we need to use rule 5 as estem,awareness and worth
Answer:
-2x+3y=45
Explanation:
I'm not sure exactlly what you are asking but I thing you have to set them equal to each other so X+5Y=2x+2y and then combine the like terms by subtracting the x to the other side, so it'll be -2x+3y=45 I believe
