Eric Walker added The Last Time a Vaccine Saved America | The New Yorker to a number of topics

Eric Walker added Polio vaccine - Wikipedia to Polio vaccines

Eric Walker added Polio vaccine - Wikipedia and The Last Time a Vaccine Saved America | The New Yorker to Polio vaccines, and added Polio vaccines to Vaccines and vaccination and Poliovirus

Eric Walker added Polio and Polio vaccines and New York declares state of emergency over polio - BBC News and Poliovirus - Wikipedia to Poliovirus, and added Poliovirus to Enterovirus C

Eric Walker added a number of topics and a number of links to Vaccines and vaccination, and added Vaccines and vaccination to Sickness, ailments, disease and diseases