33
/pt/
AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
August 1, 2025
Public Timelines
Menu
Public Timelines
FAQ
Public Timelines
FAQ
For education
For educational institutions
For teachers
For students
Cabinet
For educational institutions
For teachers
For students
Open cabinet
Criar
Close
Create a timeline
Public timelines
Library
FAQ
Editar
Baixar
Export
Criar uma cópia
Premium
Incorporar ao site
Share
eee
Category:
Outro
Atualizado:
26 nov 2017
0
0
462
Autores
Created by
Sophie
Attachments
Comments
polio
By
Sophie
26 nov 2017
1
0
441
Eventos
The Poliomyelitis Vaccination Act was passed by Congress and signed by President Eisenhower. This act provided 9.8 million doses.
Sabin vaccine developed and released to other researchers of polio.
200 million people have received the Salk vaccine.
Polio decreased dramatically by this time.
Sabin vaccine was proven safe and was released to all people.
The Salk vaccine was proven safe.
About & Feedback
Acordo
Privacidade
Biblioteca
FAQ
Support 24/7
Cabinet
Get premium
Donate
The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.
Secured with SSL
Comments