"The majority of people in the United States have been vaccinated against polio — nearly 93% of children have by the age of two, the CDC says — because many states children require a polio vaccine to attend school. However, some people are granted religious exemptions and a handful of states leave that decision to the parents, Eulberg notes."
Artykuł
Historia polio






















#starszezwoje - blog ze starymi grafikami, miedziorytami, rysunkami z muzeów oraz fotografiami
#historia #fotohistoria #medycyna #myrmekochoria
źródło: comment_1658737409vAJToC6vWgiALhMrnHw4KR.jpg
Pobierz