How does 5 months darling have a fever repeatedly to do

Five months of baby recurrent fever, should be caused by bacteria or bacterial infection, at this time need to check it, clear the cause, if it is caused by bacterial infection, can be oral antibiotic treatment, such as clozapine suspension treatment, if it is caused by viral infection, can be oral oseltamivir particles treatment. Temperature higher than 38.5 degrees, while giving acetaminophen treatment.