MARIT STINUS-CABUGON
DENGUE is a complicated disease coming in four different serotypes, or related viruses. Immunity from one serotype doesn’t mean immunity from all. In fact, the immunity arising from the first bout with the disease acts as a trigger for the more severe type. And since the first infection is usually mild – referred to as “silent primary infection” with the infected person likely unaware of being infected – we don’t know when we are candidates for the severe, second infection.