<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hello Doctor , My son is 14 months old , goes to childcare 4 days a week . Right now its Winter in Australia , he is very frequently falling sick Almost every alternate week ,down with fever , runny nose , cough etc . Is there anything available to build up his immunity ? Thanks ---Arpita  <response>: Hi...normal diet is the best immune stimulant. Cough and cold are viral 95 of the times in child Chat Doctor. For cold, you can use anti-allergics like cetirizine and for nose block, saline nasal decongestants will do. Paracetamol can be given in the dose of 15 mgkgdose max ceiling dose 500 mg every 4-6th hourly, that too only if fever is more than 100F. I suggest not using combination medicines for fever, especially with Paracetamol. For cold, you can use Cetirizine at 0.25 mgkgdose every 12 hourly for 3 days. For nasal block, plain saline nasal 