For vaccines, most major countries want trials repeated with their local population before approving them. Ironically, in the US, many/most(?) core-science phd

For vaccines, most major countries want trials repeated with their local population before approving them. Ironically, in the US, many/most(?) core-science phds and post-docs are immigrants who are used as "cheap labor". For double irony, they're often from countries that have price controls on pharma/biotech products.