I have spent a lot of years flying EMS in a variety of helicopters and have always been concerned with the lack of concern for the front end crew.
On one night flight in the mid eighties The medics showed up all gowned up ready to go with a highly infectious patient, we as a contacter had no suits; I held my ground and said" come across with the suits or no transfer". They got us some suits and we did the transfer.
For such aborne deseases as meningitis, TB, or SARs it would be a simple solution to plumb in oxygen to the pilots and crew. O2 is available on all EMS aircraft; all that would be required is the plumbing and o2 aviator masks.
Steve 76 : your mail box is full.