Public Timelines

For educational institutions For teachers For students Cabinet

For educational institutions For teachers For students Open cabinet

FAQ Получить премиум

Create a timeline

Public timelines

About & Feedback Соглашение Приватность FAQ

Cabinet Get premium

Donate

4 янв 1961 г. - Sabin vaccine was proven safe and was released to all people.

Добавлено на ленту времени:

eee

26 ноя 2017

0

0

519

Дата:

4 янв 1961 г.

Сейчас

~ 64 г назад

About & Feedback Соглашение Приватность FAQ

Cabinet Get premium

Donate

The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.

Secured with SSL