Forget the divorce! I’m freaking out about Coronavirus!

I’m in the “high risk of death“ group for Coronavirus. I’m fifty-seven years old with asthma and COPD (lung problems)! I am seriously FREAKING OUT! If I catch it I will likely DIE! I have two kids in high school who are exposed everyday to new people with new germs.
The schools are closing tomorrow indefinitely but my kids still work and have social lives. What should I do? Forbid them from leaving the house for the next year? The virus is here to stay so I need to avoid it until there is a vaccine or a cure. That’s not going to happen in the next month or two; it will take months or years. Is this virus a death sentence for those of us in the high risk category? Is it feasible or even possible to quarantine myself for a year?
What are people like me supposed to do? This is terrifying!