If my newborn just had his first mmr shot and hes running a fever, should i call the doctor?

Probably: Remember, MMR can not be given until at least one year. If your infant develops a fever (over 101 degrees) after any vaccine, and you are concerned, contact your doctor for advice. For the MMR vaccine, some children will get a mild fever and/or rash, but generally not until 10 days after receiving the vaccine.

Yes it's not the MMR: The initial MMR vaccine is typically given from 12-15 months of age. A booster dose follows at 4-6 years old. Mmr is a live virus vaccine; therefore the fever, rash, or fussiness attributed to vaccine administration does not occur with MMR until 7-12 days after the injection--unlike other immunizations. So, if there is fever just after the MMR shot, then this is caused by something else. Call.

It Depends: If the fever is less than 105 degrees or 40 degrees centigrade, and the baby is acting fairly well, then comfort treatment is ok such as tylenol (acetaminophen). If it is a reaction to the immunization, then call if the baby is acting sick.The reaction to the MMR is usually 10-21 days after the shot, but can be as soon as 4days.

It Depends: The question is confusing. Newborns don't get an mmr. It is sometimes given as early as 6mo to people traveling in risk areas, but not newborns. Any newborn with a fever should be evaluated. If your child is older, a fever before 4-7 days is likely unrelated to the vaccine and means an illness not evident when the shot was given. Call and review the findings with your doctor.