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Did you know?
The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
Did you know?
Medication errors are more common among seriously ill patients than with those with minor conditions.


