D. All the above, it can also be given to the baby during delivery if untreated before hand.
Answer:
B. Children are particularly unconcerned with hygiene and therefore are the group most responsible for spreading the flu virus to others.
Explanation:
The flu virus is spread very easily and can be very dangerous for some groups of citizens such as the elderly and pregnant women. Some cities run influenza vaccination campaigns so that at-risk groups are vaccinated and immune to the disease. Vaccinated groups are elderly, pregnant and children, although the influenza virus is almost life-threatening for children, they should be vaccinated because they are not particularly concerned about hygiene and are therefore the group most responsible for spreading the virus. flu to others.
C)associated w/ memory cells... I hope this helps.. please let me know if you need any other help and if you get it right/wrong
no, because your heart is specially designed to use electrical energy