Medical advancements and public health decisions have changed lives across generations. This page showcases health events that occurred on each calendar date — from breakthrough treatments and scientific research to key policies and global health responses. Explore how today’s date, and every day of the year, impacted healthcare and human well-being.
Select a date below to see what shaped health history on that day.
1966: First Cigarette Warnings
January 1, 1966
1971: Cigarette Ad Ban Begins
January 2, 1971
1938: March of Dimes Founded
January 3, 1938
2020: Wuhan Pneumonia Alert
January 4, 2020,
2020: CDC Starts COVID-19 Response
January 5, 2020
2021: COVID-19 Aid Announced
January 6, 2021
2020: Virus Behind Wuhan Outbreak Named
January 7, 2020
1985: First HIV-Test Approved by FDA
January 8, 1985
1920: Untilled Fields of Public Health
January 9, 1920
2020: Novel Coronavirus Genome
January 10, 2020
1964: First U.S. Smoking Report
January 11, 1964
2020: COVID-19 Genome Shared
January 12, 2020
2020: First COVID Case Abroad
January 13, 2020
1898: Aspirin Trademark Filed
January 14, 1898
2022: COVAX Hits 1 Billion Doses
January 15, 2022,
2025: WHO Global Health Appeal
January 16, 2025
2014: Smoking Report at 50
January 17, 2014
1977: Legionnaires’ Cause Identified
January 18, 1977
2020: First U.S. COVID-19 Case Confirmed
January 19, 2020
2015: Precision Medicine Initiative
January 20, 2015
2017: Twins Separated in SA
January 21, 2017
1973: Roe v. Wade Abortion Ruling
January 22, 1973
2020: Wuhan City Lockdown
January 23, 2020
2020: Second U.S. COVID-19 Case
January 24, 2020
1945: Grand Rapids Fluoridates
January 25, 1945
1823: Jenner, Vaccine Pioneer
January 26, 1823
2020: FDA Speeds COVID Response
January 27, 2020
2020: CDC’s Level 3 Travel Alert
January 28, 2020
2010: Decade of Vaccines Pledge
January 29, 2010
2020: WHO Declares COVID Emergency
January 30, 2020
1950: First Organ Transplant Success
January 31, 1950
