In Milan, four people have died from a mysterious illness with an unknown origin.

When we are feeling unwell, it's common to experience a fever, cough, and chest pain. However, these symptoms could also be an indication of something more serious, like Legionnaires' disease. Recently, there has been an outbreak of this lung infection in Milan, Italy, leading to four deaths and dozens of hospitalizations. The authorities are now working tirelessly to identify the source of the outbreak.

So far, at least 53 cases have been confirmed in two regions of northern Italy, both within the metropolitan area of Milan. To prevent further spread, local authorities are taking swift action by using chemicals to disinfect the city's water supply. Despite extensive testing of private residences and cooling towers, the exact source of the outbreak remains unknown.

The European Centre for Disease Prevention and Control states that the risk of infection is limited to those who reside in or have visited the affected areas. While Milan is a popular tourist destination, the outbreak is currently contained within these two specific locations.

Legionnaires' disease is caused by bacteria that can be found in tiny water droplets, such as those in air conditioning systems, hot tubs, and even taps and showers. It is more likely to occur in public places like offices, hotels, and hospitals rather than in our own homes. It's worth noting that the disease cannot be transmitted through drinking water, other people, or natural bodies of water.

If someone does contract Legionnaires' disease, they may experience flu-like symptoms such as a dry cough and fever. These symptoms can worsen and develop into pneumonia. Surprisingly, the majority of people exposed to the bacteria do not experience any symptoms at all. However, for those who do, it's estimated that up to 15% may suffer from severe illness that can last for a few weeks. Certain individuals, such as those over 50, smokers, and those with chronic lung conditions or weakened immune systems, are at a higher risk of developing the disease.

Out of the 53 confirmed cases in Milan, 91% of the patients had existing risk factors. Unfortunately, the four deaths were all individuals over the age of 70 who had underlying health conditions. Luckily, Legionnaires' disease can be treated with antibiotics, oxygen, and other supportive measures. If necessary, hospitalization may be required to ensure a full recovery.

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