Not medical advice. This site is general information only. In an emergency call your local emergency number. For advice about your own health, speak to a doctor, pharmacist or other qualified health professional.
Chickenpox
About Chickenpox
Causes the iconic itchy blister rash. The virus stays dormant in nerves and can reactivate decades later as shingles. A vaccine introduced in 1995 dropped US cases by over 90%. Before vaccination nearly every child caught it.
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Smallpox
Eradicated in 1980, the only human disease ever eliminated. Killed an estimated 300-500 million peop...
Bubonic Plague
The Black Death killed 75-200 million people in the 14th century, 30-60% of Europe. Plague doctors w...
Spanish Flu
Infected 500 million people, one-third of the world population. Estimates of deaths range from about...
COVID-19
First identified in Wuhan, China in December 2019. Declared a pandemic March 11, 2020. Over 770 mill...