Thank you for your query at DoctorSpring.com
How long was the exposure for?
If the exposure was brief, then there should not be any problems.
But in case it was noticed late, you need to watch out for symptoms such as sudden fever, giddiness, rash, difficulty in breathing, chest pain, diarrhea, e.t.c
If none of these symptoms develop in 12 hours time, then there is no cause to worry.
Feel free to discuss further,