Submarines

It is not surprising that submarines, which travel underwater, are ideal places for diseases to appear. Because submarines are small and crowded, illnesses can easily spread among the crew. The most prevalent diseases include common colds and the flu, as they can pass quickly from one person to another. The lack of sunlight is another disadvantage of being on a submarine. It causes a vitamin D shortage and may make crew members feel worn out and weak. Moreover, the air quality in submarines can sometimes be poor, and it may lead to respiratory illnesses such as asthma and bronchitis. Despite having medical supplies and trained medical personnel on board, the crew constantly faces the risk of catching a disease due to the limited space and extended underwater time.