Can we all please go back to common sense?
There is no vaccine and there won't be any this year.
There is also little chance of a treatment for the masses. For the critical, China is apparently using the antibodies of survivors, but there is only so much and it has its own risks.
Most people survive, but we want to reduce the number of unlucky ones. We also want to "flatten the curve" so that hospitals are not hopelessly overwhelmed.
Anyone can be infectious without symptoms. I could be shedding viruses now. You could be. Everybody should take care not to spread viruses: keep distance to others, refrain from handshakes, avoid mass gatherings, restaurants, etc... Signs of infection are difficult to take apart from a common cold, so be especially careful if you feel like you are starting a cold. But don't panic: it may really be a simple cold, this is also the season.
The virus transmits mainly by contact. It survives on surfaces, objects. But this particular virus is sensitive to cleaning (I understand that the virus envelope is made of lipids). About any cleaning material will kill it, there is no need for advanced disinfectant. Wash your hands, normal soap will do. Wash them after having be in any public place: shops, transport, etc...
Your immune system is the best barrier. Try to nudge it a good way. Take vitamins, you may be a bit low after winter. Take iron supplements if you are a little low. Quit or at least reduce smoking or vaping, as people die from lung failure, there is a strong comorbidity with nicotine. Do what it takes not to succumb to panic, stress wrecks your immune system. Keep social contacts even on house arrest. Try to exercise regularly, particularly if on house arrest. Organise yourself now for a long vacation at home, maybe get some good books.