Dec. 31, 2019: China reports cluster of cases of pneumonia in Wuhan, Hubei → later to be identified as COVID-19
Jan. 13: first COVID-19 case found outside of China in Thailand
March 3: US officials approve widespread COVID-19 testing
March 11: WHO declares COVID-19 a global pandemic
March 15: CDC recommends no gathering of 50 people or more in the US
March 21: Companies like Hanes, General Motor, and fashion industry, begin to produce medical supplies
March 23: 9 states issue stay-at-home orders in the US
March 26: US leads world in confirmed COVID-19 cases, 12 more states issue stay-at-home orders
March 30: 9 more states issue stay-at-home orders
April 3: CDC officially recommends common people to wear masks
April 6: 12 more states issue stay-at-home orders (total 42 states)
April 8: China lifts lockdown in Wuhan, the city of initial outbreak
April 10: Apple and Google announces partnership to try to use smartphone technology to trace the spread of the COVID-19 pandemic.
April 17: Florida reopens certain beaches
April 26: The Australian government launches a voluntary tracking app that uses a Bluetooth signal to determine when a person has been in contact with someone with COVID-19 (based on Singapore's TraceTogether app)