The document discusses common illnesses that occur during the rainy season such as flu, ear bleeding, cold, dysentery, chikungunya, cholera, dengue, food and water infections, and leptospirosis. It also provides tips to prevent these illnesses, which include keeping rain gear, increasing vitamin C intake, showering after rain, drinking plenty of water, watching food and drink intake, taking hot drinks, keeping surroundings clean, drinking safe water, avoiding crowds, using rain gear, avoiding contact with sick people, not swimming in floodwaters, and washing hands with soap.