If you encounter chickenpox, contact your doctor who can check your immunity. If you aren’t immune, your doctor may advise an injection to protect you from severe chickenpox.Your rubella status is checked at the start of pregnancy. If you aren’t immune, you can be vaccinated after the birth. Meanwhile you need to be extra careful.If you develop chickenpox or suspect rubella because of a rash, contact your doctor immediately, but don’t go to the doctor’s office, where you may spread the infection to other pregnant women.