100 yrs ago, summer = “polio season” as thousands of kids were infected & paralyzed & many died. We didn’t know how people got it but thought it had something to do with water+proximity. So, cities closed pools, beaches & movie theaters. Every summer. For years. Until a vaccine

<100 yrs ago, summer = “polio season” as thousands of kids were infected & paralyzed & many died. We didn’t know how people got it but thought it had something to do with water+proximity. So, cities closed pools, beaches & movie theaters. Every summer. For years. Until a vaccine. https://t.co/IfEtSMmjt8

— Chelsea Clinton (@ChelseaClinton) May 18, 2020