The reason why one case of influenza does not confer lifelong immunity is that the virus tends to mutate overtime which makes it unrecognizable to the immune system.
<h3>Why is it difficult to get immunity to influenza?</h3>
Influenza is caused by a virus which tends to mutate overtime in order to stay ahead of medical technology.
As a result, this mutation makes the original virus unrecognizable to the immune system which would then be unable to fight it.
Find out more on natural immunity at brainly.com/question/21480961
#SPJ1
Answer:
The investigator should discuss the pros and cons of both the investigational drugs and the drugs that are commercially available drug and then allow the subject so that he can decide whether to withdraw form the ongoing research to take the new drug.
Explanation:
When the 46-year man enrolled in the Phase III study of the drug. When the research was going on a new drug became available in the market in that case the investigators should discuss the benefits and the drawbacks of the investigational drug and the other drug that is commercially available then let the subject decide whether to keep on the research or not.
Answer:
The answer is "roles"
Explanation:
Rolling standards can be seen as anticipated behavior or characteristics of the occupation of the position. It is also seen as an enforced, as actions.
- Perceptions of implicit behavior must be assumed, like self-reporting, etc.
- The roles define an inappropriate behavior for the occupant of status, that's why it is important.
The answer iss B)Jack Nicholson
A weld requires 200 amps to produce a quality weld, 0.9 mm (.035”) size electrode wire is recommended.
What is quality?
The term quality refers to the consistency of a product to check as quality. The quality mostly check on lab. The quality measurement is compulsory. The quality of product to which chemical and ingredient to used.
200 amps are required to produce a weld of high quality; the optimal electrode wire size is 0.9 mm (.035"). For the most majority of welding applications, 150 to 200 amps will be adequate.
Hence, the significance of the quality is aforementioned.
Learn more about on quality, here:
brainly.com/question/18376767
#SPJ4