The Department of Health (DOH) warned the public against influenza-like illness (ILI) due to changing weather conditions.

"In recent weeks, we have experienced rain in various parts of the country, including Metro Manila. This often accompanies the spread of coughs, colds, and influenza-like illnesses or ILI," DOH Secretary Ted Herbosa said in Filipino.

From 13 to 26 April, the DOH logged 3,341 cases of ILI, 39 percent lower than the 5,456 cases recorded from 12 April to 30 March.

Meanwhile, as of May 10, the Health department reported a total of 55,099 ILI cases, seven percent lower than the 59,266 cases logged during the same period in 2024.

"Even though the number of ILI cases is decreasing, we should not be complacent, especially since we are already experiencing rain in other parts of the country," Herbosa continued.

The Health chief advised those who are sick or unwell to wear a face mask and stay at home; cover the mouth and nose when coughing and sneezing; and ensure good airflow or ventilation.

He also reminded the public to eat nutritious food and drink plenty of water.

Among the symptoms of ILI are fever, cold, body pain, sore throat, vomiting and diarrhea, and lethargy.

"Consult immediately with the doctors if the fever or other symptoms do not go away immediately," Herbosa said.

He also cautioned the public against the rise of leptospirosis cases in flood-prone areas.

"As much as possible, avoid wading, playing, or swimming in floodwaters. If unavoidable, limit the time spent in floodwaters and wash immediately with clean water and soap," Herbosa said.

Last year, the Metropolitan Manila Development Authority enacted a regulation that bans residents of Metro Manila, especially children, from swimming in floodwaters for fun.

The agency passed MMDA Regulation 24-003, which states that “children and adults are prohibited from swimming, playing, gallivanting and/or unnecessarily wading or doing any other leisurely activities in floodwaters."

In 2024, the DOH reported a total of 5,835 leptospirosis cases, a 16 percent increase compared to the 5,050 cases recorded during the same period in 2023.

The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) last week reported that the country is now transitioning to the wet season.

Last year, the wet season officially began on 29 May.