Biology, 12.08.2020 08:01 srsnider2017
If a vaccine protects you for most of your life against a particular pathogen, why do you need a new flu shot every year? A. Influenza evolves very quickly and its antigens mutate so that your memory cells from the last vaccine wonât recognize it. B. Influenza is so strong that you need a booster every year to make sure your body can fight it. C. Influenza is a virus, and vaccines only generate memory cells for bacterial infections. D. You donât need it every year, it is just offered every year for anyone who does not have it yet.
Answers: 3
Biology, 22.06.2019 00:30
At which location in earthâs interior does the top density continue to increase as thickness decreases?
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Biology, 22.06.2019 03:00
How did the discovery of the rhesus factor affect society? o more patients died from having a transfusion with the wrong rhesus factor 0 new treatments during pregnancy could prevent harm to the developing child. o less donated blood could be used in the treatment of patients. the number of blood types was reduced by half
Answers: 2
Biology, 22.06.2019 11:00
What are antigens and antibodies? how are they involved in the bodyâs response to incompatible blood?
Answers: 1
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