Regarding the test, I personally wouldn't unless he has a comorbidity or is 65+. Dr. Peter McCullough gives a nice rundown of the illness timeline and the steps you need to take if you are a high risk person. https://www.americaoutloud.com/vaccinated-or-not-acute-covid-19-in-high-risk-patients-demands-early-treatment/ If your friend is low risk, I think a test is unnecessary and just following the "treatment" version of the Zelenko protocol and doing it early will be fine. McCullough gives his treatment plan for under 50 and healthy around the 14:00 minute mark.
Regarding the test, I personally wouldn't unless he has a comorbidity or is 65+. Dr. Peter McCullough gives a nice rundown of the illness timeline and the steps you need to take if you are a high risk person. https://www.americaoutloud.com/vaccinated-or-not-acute-covid-19-in-high-risk-patients-demands-early-treatment/ If your friend is low risk, I think a test is unnecessary and just following the "treatment" version of the Zelenko protocol and doing it early will be fine.