In addition to fungi, germs and viruses of interpersonal infectious diseases. The possibility of survival in the swimming pool is extremely low. How low is this? It is probably the probability that someone across the street (20 meters) will sneeze and give you a cold.

Generally speaking, diseases caused by fungi, allergic diseases and invasive infections are the main problems caused by swimming. And everyone ignores the root of the real problem, often immune response! Simply put, it is acclimatized-people live in a dry environment, and the immune state on the skin surface is not suitable for the water environment, so the 1 emission in summer often causes some diseases. If you really like swimming, most people can overcome all kinds of minor problems and gradually get used to it.

Let's estimate first: How much water is there in a swimming pool?

Take the general gym/community swimming pool as an example: Gym swimming pool: average depth 1.5m, swimming pool length 25m, swimming pool width 6-8m; The total water volume is 280 cubic meters. Swimming pools in residential areas are generally curved. Let's make an estimate: average depth 1.3m, average swimming pool length 30m, swimming pool width12m; The total water volume is 468 cubic meters. Compare the water volume of the most popular bathtubs: a larger bathtub contains about 0.2 cubic meters (200 liters) of water. In other words, an ordinary small gym swimming pool can fill 1400 bathtubs.

The germs carried by human body, even the most vigorous fungi, hardly pose the threat of infection under such water volume.

It should also be noted that most swimming pools are cleaner than outdoor water bodies (except the sea and alpine lakes).

At least in China, all kinds of reservoirs, rivers and lakes are basically not cleaner than swimming pools as long as they can be launched. As for the argument, it goes without saying. Think about it: how long have all kinds of lakes, reservoirs and wild water bodies been preserved without sterilization and disinfection?

The concentration of various fungi and microorganisms, even parasites, is actually an order of magnitude different from that of swimming pools. So be careful in wild swimming.

It should be noted that the probability of being infected with germs in the wild water is still very small!

Some people say that swimming pools may infect hepatitis A and hepatitis B. In fact, there is almost no chance for the virus to survive and spread in swimming pools.

As for pink eye, the swimming pool is completely secondary.

The reason is that the infection season of pink eye is just the peak season for swimming, and swimming without goggles is very irritating to the eyes. This leads to two consequences: one is that the eyes turn red after swimming, and the other is that the resistance of the eyes decreases after swimming. Misunderstanding of appearance+causal inference of other infection routes, people often regard swimming pools as the infection base of pinkeye. Actually, not at all!

Pink eye was definitely not transmitted in the swimming pool. If washed and disinfected normally, there is no chance of infection even if bath towels are provided.

One more thing, swimming is a memory anchor for many people. When the seasons change, many people often remember the last time they swam. Therefore, it is not unreasonable to be a man with a back pot.