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calendar_today23-03-2009 01:43:59

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2 weeks ago

The CDC issued a warning that the vaccination rate for measles among U.S. kindergarteners has fallen below the herd immunity rate of about 95% -- and it's so contagious that 9 out of 10 unprotected people who are exposed may get sick. wb.md/3VSg9LD

The CDC issued a warning that the vaccination rate for measles among U.S. kindergarteners has fallen below the herd immunity rate of about 95% -- and it's so contagious that 9 out of 10 unprotected people who are exposed may get sick. wb.md/3VSg9LD
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