Mass Polio Immunization
The achievement marks mass polio immunization as an important Russian scientific milestone.
Historical biography archive · Updated 2026-11-03
Mikhail Petrovich Chumakov Biography and Timeline
Follow Mikhail Petrovich Chumakov through 2 dated historical records for Russia.
Mikhail Petrovich Chumakov, historical timeline
A chronological timeline drawn from matching World History Database records.
2Distinct records
1 of 1Page
1959–1959Years on this page
1959
Oral Polio Vaccine Trials
Organizes large-scale trials of the live oral poliovirus vaccine.
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.