[ImJustAnotherOkie]

Not the first year they were introduced.

[servantboy777]

>>Not the first year they were introduced.<<

...and not mRNA

[Portcall24]

Two vaccines are commercially available to prevent typhoid fever. After the bacteria responsible for the disease was discovered in 1880, German scientists first began research into these efforts in 1896. In 1909, US Army physician Frederick F. Russell developed the first US typhoid vaccination. For the next several years, the vaccine would be used for military purposes, but in 1914, it became available among the general American public. In 1796, Edward Jenner in the UK created the first successful smallpox vaccine, but it wasn't until the 1950s that vaccine treatments began to effectively eradicate the disease in some parts of the world. Contrary to what some believe, nine women cannot have a baby in a month!