Examine patients with acute Q fever again after a year If patients with acute Q fever are re-examined for antibodies one year after their infection, 98% of the patients with chronic Q fever can be detected.
New RIVM-method used to detect influenza A (H7H9) population immunity The level of immunity to the recently circulating H7N9 influenza virus in an urban and rural population in Vietnam is very low, according to the first population level study to examine human immuni