A vaccine skeptic claims “90% of the decline in infectious disease mortality in the 20th century in the US was due to factors other than vaccines”
Were vaccines relevant to 20th century US mortality improvements?
Were vaccines relevant to 20th century US…
Were vaccines relevant to 20th century US mortality improvements?
A vaccine skeptic claims “90% of the decline in infectious disease mortality in the 20th century in the US was due to factors other than vaccines”