This is a speech on herd immunity given by Dr. Suzanne Humphries in 2015. Please check it out here.
She covers all aspects, history and so very much info.
-Vaccine Memes
This is a speech on herd immunity given by Dr. Suzanne Humphries in 2015. Please check it out here.
She covers all aspects, history and so very much info.
-Vaccine Memes