Since the hemagglutinin gene is how a virus is able to get into a cell, and the neuraminidase gene disperses those copies into the body. In order to have it transferred from human to human is for the hemagglutinin gene to change.
Answer:
b
Explanation:
but I have a grh have a great day of school and again and again and again and again and
nhi hai na ki Jay Shree shyameat day of school and again
