Indefinitely. Better to just die.
On a serious note, would you refuse a COVID call for "safety". You have a mask and a working truck with the extra ventilation fan thing. After the call you go back to base so they can decon the truck.
We had a corona case a couple of months ago when supposedly COVID 19 had only made it to Seattle, that didn't get sub-typed because we were told that there was no way the diease could have already spread here. Several of the staff, myself included, got pretty sick for 2-3 weeks afterwards but we didn't get admitted and all recovered with OTC meds. We have been told that there is no ability to test us with a titer at this point, so we have no idea what we were all actually infected with; that being said we all got diagnosed with viral syndromes and secondary pneumonia.
I highly suspect that was COVID 19, that we have no idea what the community spread really is, and the disease isn't as bad as people make it out to be.
No, I wouldn't refuse a call for safety. That being said I really don't worry that much about dying from COVID or any other contagious disease. I'm statistically more likely to die this year from being hit by a drunk driver than of dying from COVID given my age and general health. I'm even more likely to get diagnosed with a secondary leukemia from all of the chemo I've given over the years than die of COVID, and we have lost young nurses to leukemia before. Wash your hands, wear a mask, and keep living your life.