when did the flu shot first come out
Influenza vaccine Vaccination against influenza began in the 1930s with large scale availability in the United States beginning in 1945.[12][13] It is on the World Health Organization's List of Essential Medicines, the most effective and safe medicines needed in a health system.[14] The wholesale price in the developing world is about $5.25 USD per dose as of 2014.[15] In the United States, it costs less than $25 USD as of 2015.[16]
Polio vaccine The first polio vaccine was the inactivated polio vaccine.[1] It was developed by Jonas Salk and came into use in 1955.[1][5] The oral polio vaccine was developed by Albert Sabin and came into commercial use in 1961.[1][6] They are on the World Health Organization's List of Essential Medicines, the most effective and safe medicines needed in a health system.[7] The wholesale cost in the developing world is about US$0.25 per dose for the oral form as of 2014.[8] In the United States it costs between $25â€“50 for the inactivated form.[9]