Can the MMR-Var vaccine cause fever and a decrease in appetite?

Yes, the RRO-Var vaccine can cause fever and a decrease in appetite as side effects. It is important to monitor your child's overall condition, ensure they are still able to eat and drink (even if a bit less), and that the symptoms seem to be improving. It is not recommended to combine Tylenol and Advil for fever relief without medical advice, as one of the medications should be sufficient. If the fever persists despite taking one of the medications for the specified time periods, it is recommended to consult a doctor.