COVID-19 pandemic

2020 pandemic caused by SARS CoV 2 virus.

One surprise of this pandemic was that many rich, scientifically advanced countries botched the response while many poorer countries have managed it much better. For instance, take a look at this article: What the US can learn from how African countries handled Covid.

It also teaches a lot about Epidemic surveillance testing.



Mode of spreading and prevention efforts

The transmission through large droplets and the surface has been identified as the important concern at the beginning. Although evidence for airborne, aerosol-based transmission has been mounting, a lot of efforts has been misdirected. Instead of focusing on ventilation, deep cleaning, flexiglass, etc. have been highly active.

Zeynep Tufekci has been talking about this issue. e.g., his thread on a mystery transmission from New Zealand. (Eichler2021transmission)

Modeling epidemic

Economic implications

Healthcare implications

Elimination vs. mitigation

Elimination vs


A study claimed that the biggest source of misinformation has been the president Donald Trump1, who publicly touted many unproven therapies. See Internet Searches for Unproven COVID-19 Therapies in the United States

See also Hydroxychloroquine.

An important infodemic is about vaccines. COVID 19 vaccine


Perra2021nonpharmaceutical reviews non-pharmaceutical interventions.

This pandemic highlighted the effectiveness of Mask wearing.

Application of Deep learning