Hi and welcome to HCM. Thank you for your query.
the majority of respiratory infetions are viral,especailly in the beginning of infection. Later it can become bacterial pharyngitis
. If there is no productive cough
, more than 39 fever
or mouth odour it is likely to be virus so antibiotics arent needed. If you notice these symptoms or this persists more than 4-5 days you should visit doctor. Wish you good health.