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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Yes because of the white matter it’ll just- I don’t know I just need points sorry :(
Lungs = respiration, provides oxygen to the blood.
heart = arteries, pumps blood.
Answer:
When a person dies the medical professional needs to fill the death certificates with the cause, mechanism, and manner of death on it. There is confusion between all three terms.
The cause of death is the reason behind the death such as disease or injury that makes disruption physiologically inside the body of an individual. The mechanism of death is the derangement that arises due to the cause of death and leads to the death of the person. The third term is the manner of death is how death came (physiological reason).
An example is - a person shot by a gun in the chest (cause of death) which leads to excessive blood loss (mechanism of death) which is homicide (manner of death)
Answer: Ok Diastole commences with the closure of the aortic and pulmonary valves. Intraventricular pressure falls but there is very little increase in ventricular volume (isovolumetric relaxation). Once ventricular pressure falls below atrial pressure, the mitral and tricuspid valves open and ventricular filling begins.The first heart sound (S1) is produced by vibrations generated by closure of the mitral (M1) and tricuspid valves (T1). It corresponds to the end of diastole and beginning of ventricular systole and precedes the upstroke of carotid pulsation.
Hope this helps have a awesome day/night❤️✨
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