This is a great question! At present, no one knows it for sure. There are reports that the coronavirus can happen twice:
A man in his 70’s first tested positive for SARS-CoV2 on February 14 while on Diamond Princess cruise ship. Then he stayed in a Tokyo medical facility until testing negative for the virus. On March 2, he left the facility and traveled home via public transportation. However, the man eventually began feeling sick with a fever, which prompted him to go to a hospital on March 13. The following day he tested positive for the virus again.
Then there’s the February 14 article from Caixin, a Beijing, China-based media group, that was entitled “14% of Recovered Covid-19 Patients in Guangdong Tested Positive Again.”