The outbreak started in one of the most authoritarian regimes in the world and it still spread (could not have more effective quarantine except in North Korea and the former Soviet republics) and there is no drug treatment (besides trying different current/experimental antivirals), only waiting out the infection. That cruise ship quarantine showed there is something else wrong as well since it appears either the test is faulty or people can be infected without triggering a positive test based on the people who got sick again after leaving quarantine.