According to the Ministry of Health and Child Care draft addendum for home based management of Covid 19, if one suspect having the virus, they should not use public transport when going for tests.
Apparently, Permanent Secretary in the Ministry of Information Publicity and Broadcasting Services Nick Mangwana butresses the guidelines pointed out in the document.
He posts:
“If you suspect or have COVID-19; Do not use public transport to go for your test. 
“Self-isolatefrom family members and members of the community.
“Continue to take your chronic condition meds.
“Stay in isolation for 10 days from the date of a +ve test, but with symptoms.”
Below are the guidelines: