In the rainy season and during floods, immune system decreases so that the danger of communicable diseases is more easily spread. If it is underestimated, it is not impossible that this common disease can cause complications.

Exposure to rain, the amount of standing water, the cold, and often make contact and gather in the room with people or objects that are contaminated with the virus makes many people infected with certain diseases in the rainy season. Recognizing various common diseases that usually occur in the rainy season will make you more alert and ready to deal with and prevent them.

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Influenza / flu

Flu is caused by infection with influenza virus types A, B, or C. This virus is spread through droplets of body fluids such as snot or saliva that can be transmitted through the mouth, nose, or hands that touch contaminated objects. This infection will attack the respiratory system and cause symptoms such as fever, cough, aches and sore throats. Although it is general and not dangerous, but some people can suffer from influenza complications such as pneumonia.

Dengue hemorrhagic fever

Viral diseases caused by Aedes Aegypti and Aedes Albopictus mosquitoes often occur in the rainy season when mosquito breeding increases. Dengue fever occurs when the virus enters the human body due to mosquito bites. Although generally not dangerous, but the disease is characterized by pain throughout the body and this fever can result in complications that lead to fatal bleeding due to damage to blood vessels.


Malaria is a plasmodium parasitic infection that is transmitted through the bite of anopheles mosquitoes. Transmission of malaria usually increases during the rainy season and continues thereafter. This disease is characterized by a fever that appears around 10-15 days after a mosquito bite occurs. The initial symptoms that accompany are headaches and chills. If not treated immediately, malaria can develop and risk threatening the lives of sufferers.

Infectious diseases through water contamination

These diseases are spread by consuming contaminated water or food. Here are a few types:


Diarrhea is a condition characterized by a frequency of bowel movements (BAB) that increases compared to normal and watery stools are excreted. Broadly speaking, the cause of diarrhea is eating food contaminated with bacteria, viruses, or parasites. Diarrhea usually only lasts a few days, but in some cases it extends to weeks. Diarrhea in the rainy season is usually caused by salmonella, shigella, and cholera bacteria.

Hepatitis A

Acute liver infections due to hepatitis A virus mostly occur in children. Hepatitis A is characterized by nausea, vomiting, fatigue, stomach ache, loss of appetite, flu-like symptoms, sometimes jaundice, and fever.

Typhoid fever

High fever caused by Salmonella typhi and spread through contaminated food. Typhoid fever is commonly found in developing countries and can be dangerous if not treated properly and quickly. In addition to fever, this disease is often characterized by stomachaches, headaches, constipation, or diarrhea. If not treated immediately, the sufferer can experience complications such as meningitis, liver and gallbladder infections, pneumonia, to disorders of the kidneys and heart valves.


Leptospirosis is a disease that is transmitted through urine or the blood of wild animals or pets such as dogs, rats, cows, and pigs. Humans can become infected if they come into contact with contaminated water or soil. High fever, headache, nausea, vomiting, red eyes, chills, sore calf muscles, and stomach pain are the symptoms that mark this disease. But in certain cases, this disease can cause liver disorders, kidney failure, meningitis, to respiratory failure.

Asthma attack

Cold weather that often accompanies the rainy season can be a trigger for asthma attacks on sufferers. When a person breathes quickly, the exchanged air does not get warm, thereby increasing cooling and swelling of the airways.

Preventing Disease in the Rainy Season

The good news, there are various simple ways that can be done to maintain health in the middle of the rainy season so that activities are not disrupted.

  • Influenza, dengue and hepatitis A vaccines that may be needed can be obtained at the doctor.
  • Always provide an umbrella or raincoat to reduce rain exposure.
  • Limit being in public places or crowds where air ventilation is limited, especially avoid contact or be around people who are sick.
  • To reduce the risk of illness, when eating out, it’s better to choose to eat in a clean place to eat than at street vendors.
  • When flooding, as much as possible avoid walking or wallowing in flood water.
  • Make sure the water you consume is really clean.

Many diseases can spread through contaminated water. Make sure the water you drink is cooked and hygienic.

  • Wash your hands regularly with soap, especially before and after cooking food, also before eating.
  • Check if a family member is sick so that they get immediate treatment and do not infect other family members.
  • Wash thoroughly all food ingredients, especially natural ingredients that are not packaged.
  • If a house is flooded due to heavy rain, it is important to clean all furniture, especially children’s equipment such as toys that are flooded with disinfectant.
  • To avoid mosquito-borne diseases, use mosquito lotion or spray, or insect repellent for the room. Wear long-sleeved clothes, especially when outdoors activities. Anti-mosquito gauze can also be used on windows.
  • Drain the bathtub and the usual places where mosquitoes breed, at least once a week.
  • Eat healthy and fresh food to maintain the immune system.

By preventing and managing one’s health and environment properly, the risk of illness in the rainy season can be minimized, so that daily activities can run smoothly.

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