TayrcahakeCarole TayrcahakeCarole

21-05-2017
Biology

contestada

A flu vaccine is needed seasonally to be effective but a polio vaccine is only needed once. the best explanation of this is ________.

Respuesta :

mona82592 mona82592

21-05-2017

The flu has several strains that change seasonally

Answer Link

shockgamespvp shockgamespvp

21-05-2017

the flu virus code changes often as polio virus does not change at all.

Answer Link

Otras preguntas

People who don’t work at all do not affect the economy. True False?

Los pisos tienen una estructura cuadrados cuadrada cuadradas

City Hall is 4 meters shorter than the bank. The bank is 13 meters tall. The hospital is 11 meters tall. How tall is City Hall?

pls help me complete the question 9to10. Thanks

Differentiate between anorexia nervosa and bulimia nervosa. Name three symptoms that must be present for a diagnosis of anorexia nervosa and three symptoms that

Steve was arrested in a rest stop by a police officer for speeding on the highway. He was arrested about ten yards from his car. The officer nonetheless searche

Can someone please answer number 7. The first question. Pleaseeeeee

Which of these events occurred as a result of racial discrimination? A. Vernon Baker failed to receive a Medal of Honor until 1997. B. Vernon Baker's legal work

what is network days function

If a buyer and an agent have agreed to an oral buyer agency agreement, this agreement is