This page used to update almost daily until I graduated from Caltech at the end of 2022.

To select a specific interval, click and drag on the minimap. Move your selection left and right to scroll. Use the toggle to switch to viewing daily cases.

The World Health Organization declared a global pandemic due to COVID-19 on 11 March 2020. On 16 March 2020, Caltech officially closed, with undergrads not returning to campus after spring break and graduate students, staff, and faculty staying home. After 3 months at home, Caltech laboratories reopened on 8 June 2020 with modified capacity and safety protocols, and Caltech has been gradually returning to full capacity since then.

Events correlating with increases in COVID-19 cases:

• 2022-03-17 – 2022-03-25: Spring break
• 2022-05-20: Graduate Student Council Formal
• 2022-05-27: Undergraduate social trip

Note: for summer 2022, students who are visiting researchers are classified as employees.

Data sources

Caltech data transcribed manually from the Caltech Case Log. Date indicates the date that a case was posted on the case log (not the date of a positive test). CCC indicates Children's Center at Caltech. Omitted cases where the person had not been on campus in the last month.

Data tools

All data analysis and visualization performed in Python.

Analysis	Visualization
Pandas	Vega-Altair

caltech_covid19 is maintained by lealiaxiong.