Answer:
He/she should cover his/her mouth using handkerchief or towel.
Explanation:
Because sometimes when people was coughing or sneezing they used their hands to cover their mouth which is correct but improper, the proper covering of mouth when coughing aren't using hands because we use our hands in our daily lives or in everything so it means our hands are always dirty. We can spread viruses or bacterias through shake hands so it's better to use handkerchiefs or our elbow to avoid spreading of viruses or bacterias that'll cause infections our influenza.
Thank you:)
