Showing posts with label
vaccination
.
Show all posts
Showing posts with label
vaccination
.
Show all posts
February 27 - On This Day in Science...
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Posted on February 27, 2021 This is an update of my post published on February 27, 2010: On this date in 1813, President James Madison sig...
January 21 - Anniversary of the Beginning of the End for Smallpox!
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Posted on January 21, 2021 This is an update of my January 21, 2010, post: Anniversary of the introduction of the smallpox vaccine – 1799 ...
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