Slowly, then quickly

You never know whether you are at the top of an S-Curve except in hindsight.

My new favourite chart:

A timeline of how many vaccines weʼve discovered & when.

Note: 80 year gap between the 1st & 2nd vaccine. The vaccine against smallpox virus was developed before people knew what viruses were, *before germ theory had developed*

Then discovery took off. pic.twitter.com/hJQTPddBT7

— Saloni (@salonium) September 7, 2023