Links
[1] https://www.sciensano.be/nl/biblio/epidemie-de-grippe-vaccination
[2] https://www.sciensano.be/nl/biblio?f%5Bauthor%5D=37512&f%5Bsearch%5D=Isabelle%20Thomas
[3] https://www.sciensano.be/nl/biblio?f%5Bkeyword%5D=519&f%5Bsearch%5D=de
[4] https://www.sciensano.be/nl/biblio?f%5Bkeyword%5D=2139&f%5Bsearch%5D=Grippe
[5] https://www.sciensano.be/nl/biblio?f%5Bkeyword%5D=1896&f%5Bsearch%5D=Vaccination