The white needle is called a bottle stopper puncture outfit, and it is not acceptable to touch it by hand in principle. However, if the infusion set is changed, it will cost money, and another injection is not cost-effective, so just continue to use it and it will not be contagious. Disposable infusion set is mainly used to prevent cross infection.
The probability of infection in healthy people is very small, so there is no problem, rest assured.