The United States Postal Service issued a media statement on April 2, 2020 regarding COVID-19 and mail/packages.

They note that the CDC (https://www.cdc.gov/coronavirus/2019-ncov/faq.html), the World Health Organization (https://www.who.int/news-room/q-a-detail/q-a-coronaviruses), as well as the Surgeon General have indicated that there is currently no evidence that COVID-19 is being spread through the mail.

Read more at :   https://about.usps.com/newsroom/statements/usps-statement-on-coronavirus.htm