[brigandish]

> As a Web of Science Highly Cited Researcher, He was ranked in 2018 as among the Top 1% of all scientists worldwide.

Let's cut that down to hundreds.

[infinity0]

If 1% of all (medical) scientists is 500 then that means there are 50k (medical) scientists in the whole world. With some basic web searching, that would appear to be an underestimate; "thousands" would be a better estimate.