And this immediately gets to the core of the issue: in a crisis, you want a government that tells the truth.
In my family, 33% of us are vulnerable.
Do the same math for your immediate family.
Count up heads and for each apply these rules:
immune system issues?
respiratory issues?
heart disease?
diabetes?
If any are 'yes' then they are vulnerable.
In mine, it's 7/21 = .33 * 100 = 33%