1 ene 1908 año - Polio
Descripción:
Its caused by a very small virus. The virus affected somone who is infected. The virus spreads from feces into water which is contagious. The two avaible vaccines are OPV- oral polivirus and IPV-inactiviated polivirus vaccine.
Añadido al timeline:
fecha:
1 ene 1908 año
Ahora mismo
~ 116 years ago