Persistent mild dry cough , nausea , weakness. Close contact with covid patients from 16th April to 1st May. have done rtpcr test , results negative . He had cetrizine tablet for 10 days , cough syrup ascoril d for 3 days  ,multivitamins ( zinc supradin limcee ) and some home remedies like steam inhalation, salt water gargle , kadha , sualine. But have no relief from cough. Cough is not severe but mild and persistent .