Jong JC de ; Bartelds AIM ; Bestebroer TM ; Bijlsma
K ; Verweij C ; Verweij-Uijterwaal MW ; Wermenbol AG ; Loon AM
van
35 p
in Dutch
1994
Toon Nederlands
English Abstract In the season 1993/94 the virological NIVEL
(Netherlands institute of primary health care)/RIVM-surveillance of
respiratory virus infections was continued. The sentinel general physicians
participating in the NIVEL network submitted 298 samples from patients with
respiratory complaints From 92 (31%) of the samples a respiratory virus was
grown, 67 of which were influenza A (H3N2) viruses. The antigenic
reactivity of the strains in haemagglutination inhibition tests corresponded
well with the virus isolates from diagnostic laboratories. When calculated
per 10,000 persons, most influenza viruses were obtained from children aged
5-14 years. This is at variance with the NIVEL registration of
influenza-like illnesses, which showed the highest incidence in the age
group of 0-4 years. The protective effect of influenza vaccination over the
seasons 1991/92, 1992/93, and 1993/94 was estimated at
76%.
