RT @bambubule: Intern #RIVM stuk van 7 februari 
Zou over mazelen vaccinatie gaan, maar is vooral pleidooi voor #HerdImmunity . Bovendien b…
RT @bambubule: Internal #RIVM piece of February 7
Would go on measles vaccination, but it is especially appeal for #HerdImmunity. Moreover, b ...
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