Fig. 3From: A serological framework to investigate acute primary and post-primary dengue cases reporting across the PhilippinesAlgorithm 2 (A2): dengue immune status algorithm. Criteria used to determine the dengue immune status of the study population across the Philippines during 2015–2016. Primary DENV, current dengue infection with no previous flavivirus infection; post-primary DENV, current dengue infection with at least one previous flavivirus infectionBack to article page