Pat,
This is not a vaccine. It’s an antiviral in stage 3 clinical trials. Its a hope at this point. The only time this medicine would ever be used is when a person was already very ill and in the hospital. The US trials are being done some where in the midwest I read. Only those who have contracted COVID-19 and are now very sick would have even the possibility of being enrolled in such a trial. There is no way any medical facility would even test you for COVID-19 unless you have severe symptoms and flu and bacterial infection had been ruled out. There is no reason to be tested if you aren't sick and no one would do it.
The best we can do at this point is the personal hygiene things already posted in this thread then not worry about it. CDC also says to not go on cruse ships, and think twice about air travel if you are in a high risk group.