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
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A natural born killer is a good and interesting concept because it honestly depends on the surroundings, and the feelings they have. If a child is angry toward a parent, or a sibling constantly, they may go outside and i don’t know maybe kill a bird. Killing animals constantly out of rage or just spite is one of the main signs of that killing a person could be possible in that person. no one is born a killer, there are a lot of physiological aspects behind the motivation of killing . It depends on ur back ground, and u mental state
Answer: Past time focus is that we are paying attention to the things that we have experienced in the past Present time is that you are focusing on immediate gratification. Especially appreciate life, nature, and the people around them.
Explanation: BecauseThird individual solitary straightforward present demonstrative type of center is centers or focuses.
I’m not sure what you mean by cancer that may turn malignant... if it is cancer it is already malignant. But for gastric cancer that has a chance of metastasis, several rounds of chemotherapy or radiation therapy, in order to shrink the tumor, followed by a partial gastrectomy.
