Ketamine by itself is reasonably safe. It should be monitored. Don't take large doses, other substances and then sit in a hot tub. today's safety tip.
In mental health we are using doses of 0.5 mg/kg-1 mg/kg. Anesthesia often use 6-10 mg/kg with other substances.
Catdog, what is the thresh hold for number of attacks. Assaults on nurses and staff occur daily.
I have heard of anything brewing that might breakout in a pandemic that soon, but Covid went from 'it will go away' to a panic in 60 days.