4 ms·
Good explanation on efficacy of vaccines. https://www.youtube.com/watch?v=K3odScka55A https://www.youtube.com/watch?v=K3odScka55A
by overcast 6y ago
Good explanation on efficacy of vaccines.
https://www.youtube.com/watch?v=K3odScka55A https://www.youtube.com/watch?v=K3odScka55A