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Manila reports spike in flu-like illness cases as disease surveillance alert issued

The Manila Health Department documented a significant uptick in influenza-like illness cases on Monday, marking the highest weekly increase among communicable diseases currently tracked in the capital. The surge underscores growing concerns over respiratory illness transmission as the city continues monitoring multiple disease threats.

LSN Philippines · 21 September 2026

Manila recorded 32 new cases of influenza-like illness on Monday, substantially outpacing other communicable diseases under active surveillance in the city, according to data released by the Manila Health Department. The figure represents the most significant daily increase among respiratory and water-borne illnesses currently affecting residents, prompting health officials to heighten monitoring efforts across the metropolis.

Beyond influenza-like illness, the health department documented 22 additional dengue fever cases and 15 new leptospirosis cases during the same reporting period. The surveillance report also confirmed one new COVID-19 case, indicating that coronavirus transmission, while reduced, continues to circulate in the city.

The Manila Health Department tracks influenza-like illness, dengue fever, leptospirosis, and COVID-19 as priority communicable diseases requiring systematic monitoring and public health response. Officials have not yet issued specific guidance regarding the influenza-like illness spike, though the elevated case count suggests heightened respiratory disease activity in the capital region.

The concurrent circulation of multiple communicable diseases underscores the importance of sustained disease surveillance and public adherence to established preventive health measures, including vaccination and mosquito control initiatives where applicable.