Excuse me, if you stay in a five-star hotel, use the hotel bathtub and disinfect yourself twice with disinfectant before use, will you still get infectious diseases?

There should be no infection caused by using the bathtub.

In fact, as long as the disinfection treatment is proper, the disinfectant selected is reasonable and the disinfection time is enough (generally 30 minutes), generally speaking, all possible pathogenic microorganisms can be killed only once.

But it is unlikely that there will be pathogenic microorganisms in the hotel bathtub. Five-star hotels should achieve "one guest, one use and one disinfection" as required.

If disinfection is really needed, it only needs to be disinfected once.