[ad_1] This 1975 microscope image made available by the Centers for Disease Control and Prevention shows a group of smallpox viruses. (Photo: Fred Murphy, AP) The Food and Drug Administration approved the …
Read More »[ad_1] This 1975 microscope image made available by the Centers for Disease Control and Prevention shows a group of smallpox viruses. (Photo: Fred Murphy, AP) The Food and Drug Administration approved the …
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