Trung bình 1 người mắc sởi có thể lây cho 12-18 người khác
90% người chưa có miễn dịch sẽ bị mắc bệnh nếu tiếp xúc gần với bệnh nhân sởi. Trung bình 1 người mắc bệnh có thể lây cho 12-18 người khác.
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4buQ4buQbnDhu47EkUbhu5jDlMOD4bqwcOG7m2XEkOG6sEZxZWXDrWg5xqEv4buO4bubxqEvxIJFU+G7mw==