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→By March 15, 2021 (start any time)
*** '''Existence value''': It's hard to find a good single source explaining the evolution of contact tracing. A timeline could add considerable unique value on that front.
=== By March 15, 2021 (start /continue any time) ===
* [[Timeline of vaccines]] (Expansion started on June 1, 2020): Expand, restructure, add columns and in particular make it a more useful timeline for people trying to understand vaccines in order to understand the prospects for a coronavirus vaccine.
