In article 7173eb86-55d0-4a38-a714-b8cdb85b0967@
2g2000yqr.googlegroups.com, says...
airlocks must be opened for ingress egress......

You should look at suit-locks, which are being studied in detail. Suit-
locks minimize the amount of air released and also minimize the area
exposed to the outside (i.e. the parts of the suit and inside of the
suit-lock which need disinfected).

and although operating rooms arent perfectly sterilized they are some
of the cleanest places in the hospital

A suit-lock would be much the same. These "problems" you keep pointing
out are engineering details which will need to be worked out, not show-
stoppers that should stop the program from proceeding at all.

Jeff
--
"the perennial claim that hypersonic airbreathing propulsion would
magically make space launch cheaper is nonsense -- LOX is much cheaper
than advanced airbreathing engines, and so are the tanks to put it in
and the extra thrust to carry it." - Henry Spencer