(insert raspberry sound here)
Two of the most dreaded ophidian viruses can remain dormant (read "asymptomatic") for an as of yet unknown period of time. Those two heavy hitters would be OPMV and IBD - both of which do not have a fool proof screening test and both which have been proven to be able to be carried asymptomatically by snakes for well over 10 months.
...and that's not to mention other viruses like adenoviridae.
The vast majority of people here don't even know what proper QT protocols are. Info on proper QT procedures should not be gleaned by canvassing popular opinions on a snake forum. All new arrivals should be quarantined regardless of the source. Too much flipping and importing animals and to many people who DON'T follow QT to take a chance with your collection.