From what I've read Ebola has killed many healthcare professionals because they infected themselves when disposing off PPE. As a result a disproportionally large portion of deaths were healthcare workers.
> With COVID, a worker could get infected, hide the exposure out of fear/shame, never show any symptoms... and yet start a pandemic.
In many countries workers are actually incentivised to come to work sick and infect others.
It's not exceptional in many of the ways viruses can be. It's not as deadly as Ebola. Or as durable as Norovirus. Or as transmissible as Measles. It's just...really good at its job.
The lack of fomite transmission for SARS-CoV-2 has saved a lot of healthcare workers.