сряда, 21 ноември 2018 г.

New Your Times - Health - Chickenpox Outbreak at School Linked to Vaccine Exemptions


By CHRISTINA CARON
NYT Health
It is the largest outbreak in North Carolina since the chickenpox vaccine first became available in 1995.
Published date: November 20, 2018 at 02:00AM
at 5:19
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