Freee Market Capitalism does a crap job in the healthcare sector. Vaccine R & D is included in that mess. Even if/when a vaccine for Covid-19 makes its way to "the market"....the delivery won't be based on need, but power. Just like the N1H1 vaccine that went first to Wall Street executives, because they were considered "essential workers", above healthcare providers. SSDD.
BTW, I'm still waiting for the GOP healthcare plan that replaces the ACA (Obama Care). To date, it still sounds like trading a chicken for a check-up.