Incident: Sky Regional E175 at Washington on Mar 31st 2015, severe turbulence sickens captain and incapacitates first officer
http://avherald.com/h?article=484909ea&opt=0
Both flight crew felt sick and had problems controlling the aircraft, at 1600 feet the crew initiated a go-around and received vectors for a second approach.
The first officer became ill and was unable to continue duties.
The captain requested a diversion to Baltimore at low altitude below turbulence, ATC provided vectors to Baltimore but refused vectors at low altitude.