It is not normal for a one year old baby to have a fever of 41 degrees due to a viral infection. 41 degrees is a high fever and needs to be treated as soon as possible. Viral infection is the invasion of viruses into the body caused by different infectious lesions, the young baby’s own immune system development is not mature enough, so it has become one of the most common viral infections of the population. The reason why viral infections cause babies to have a fever is because the timely metabolic products of the virus cause abnormal stimulation of the body, affecting the thermoregulatory center caused by the virus. And 41 degrees belongs to the high fever, is not normal, if not timely treatment, is likely to trigger febrile convulsions (due to high fever caused by convulsions convulsions), and even damage to the brain, should seek medical attention in a timely manner, under the guidance of the doctor symptomatic use of medication to reduce fever, commonly used are ibuprofen suspension, acetaminophen and so on. Parents who find their babies with high fever must seek medical attention as soon as possible.