about 1962.
Polio vaccines are available. Taking those vaccines after birth and in early childhood can help to resist the disease.
yes
From the Centers for Disease Control and Prevention (CDC): Since 2001, with the exception of some influenza (flu) vaccines, thimerosal is not used as a preservative in routinely recommended childhood vaccines.
This was not a good time for children. Half of the children born died in their first year and only 2 out of 10 babies survived their second birthday. This was before most childhood vaccines were invented.
many people would have died that the vaccines saved. So, many people who are alive now wouldn't even be here because their ancesters would have died because there were no vaccines invented.
Not Sure who "Edward Jenna" is but Edward Jenner is the scientist who invented vaccines... :D
Louis Pastaur discovered the vaccine for anthrax and chicken cholera
pie was invented
The great scientist Louis Pasteur invented both the vaccines.
Louis Pasteur invented the vaccines for chicken cholera and childbed fever.
age appropriate vaccines should be administered
The polio vaccine is called the Salk vaccine after it was invented by Dr Jonas Salk.