Gao Yuan was undergoing decontamination, which involved two Anti-Chemical Militants hosing him down with strong disinfectant all over his body and repeatedly disinfecting everything he brought with him.
So, Gao Yuan was completely naked now since he had removed all his clothes and equipment. Even electronic devices had to be disinfected over and over again, following the principle that it was better to risk damaging the equipment than to bring the virus back.
Had it not been for the close contact with the corpse of the Armored Beast and the fact that he had carried back two of the Armored Beast's legs, Gao Yuan would definitely not have to suffer like this. But the virus on the body of the Armored Beast was on a different level from the virus in the air, so he had to be especially careful.