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
#SPJ1
Answer:
The correct answer is option C. hepatic portal system.
Explanation:
The hepatic portal system involves hepatic portal veins and its accessory tributaries. The hepatic portal system collects blood from digestive organs and spleens that consist of nutrients absorbed from these organs and circulate to the liver.
This system is unique to circulate both oxygenated and deoxygenated blood. This system involves most of the digestive organs from the esophagus to the end of the canal.
Thus, the correct answer is option c. the hepatic portal circulation.
Keep soft objects,loose bedding
Answer:
well, put all 4 of them in your mouth, next, take the drenched pills out of your mouth and examine 2 of them, put the rest in your pocket. blue dries faster, now we know how to differentiate them. To conclude it up, take the pills that are dry and wet. if both pills dry at a near time ratio, eat one from your hand, and another from your pocket.
Explanation:
Answer:Kimberly Dunning was admitted to the hospital with dyspnea related to an asthma attack. Which acid-base imbalance is she at the highest risk for developing ...
Explanation:
