The US spends $2.6 billion a year trying to find a cure for AIDS and the virus that causes it: HIV. The disease is still endemic to (mostly) the gay population.
The US just shut down the entire nation, and just allocated more than $2 trillion to fight the Wuhan virus. That effort isn’t working either. Why not?
The same reason: you can’t get people to stop the risky behaviors that allow the virus to proliferate.