Mosquito-borne diseases such as dengue and malaria remained prominent in 2025. Seasonal flu and measles cases also increased, especially among the unvaccinated. Eye and skin infections also increased.
Weather changes and busy lifestyles all increase the risk of many diseases. We're expected to experience a variety of illnesses in 2025. Now, we're looking at the five most commonly reported illnesses in 2025...
Dengue and other mosquito-borne diseases
Dengue cases remained high in 2025, especially in urban areas. The rainy season increased mosquito populations near homes, and chikungunya and malaria also spread rapidly.
Dengue and other mosquito-borne diseases (such as malaria, chikungunya, Zika, yellow fever, Japanese encephalitis, West Nile virus) are serious illnesses spread by infected mosquitoes. Symptoms can range from fever/skin rash (dengue, Zika, chikungunya) to severe joint pain (chikungunya), jaundice (yellow fever), and nervous system problems (Japanese encephalitis, West Nile).
2 - Seasonal influenza (flu)
Seasonal influenza (flu) is a serious respiratory infection caused by the influenza virus. It is common in all parts of the world. Most people recover without treatment. Influenza spreads easily between people through coughing or sneezing. The best way to prevent the disease is vaccination. Flu symptoms include fever, cough, sore throat, body aches, and fatigue.
3 - Measles
In 2025, measles cases were reported in several areas. Many cases were found in unvaccinated children and young people. Measles is a highly contagious disease caused by the rubella virus. Its main symptoms are high fever, cough, runny nose, red eyes, and a red rash. The best way to prevent this disease is vaccination (MR vaccine). It can spread through the air and through contact with infected people.
4th - Eye and 5th - Skin infections
Conjunctivitis and fungal skin infections have continued to rise. These are associated with crowded places, sharing towels, gym equipment, and humid climates. They rarely cause serious illness.
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