Sources:
Anderson RM, May RM. Vaccination and herd immunity to infectious diseases. Nature 1985; 318: 323-9.
Vaccines: Calling the Shots. Prod. Michael Rosenfeld. By Belinda Thiester. Perf. Sonya Pemberton. 2015.
Anderson RM, May RM. Vaccination and herd immunity to infectious diseases. Nature 1985; 318: 323-9.
Vaccines: Calling the Shots. Prod. Michael Rosenfeld. By Belinda Thiester. Perf. Sonya Pemberton. 2015.