8 дек 1963 г. - Albert Sabin (OPV)
Описание:
The OPV is an oral vaccine that releases active viruses into the gut. It is a cheaper alternative to the IPV and does not need health officials to administer the vaccination.Добавлено на ленту времени:
Дата:
8 дек 1963 г.
Сейчас
~ 61 г назад