Feb 6- Coventry Health Care Inc, which is being bought by larger competitor Aetna Inc, reported a higher fourth-quarter profit Wednesday that beat analysts' expectations, helped by improvements in its Kentucky Medicaid business.
*Sanofi runs out of most vaccine dosages. Sanofi SA, the largest flu vaccine provider in the United States, said on Thursday it had sold out of four of the six different dosages of Fluzone seasonal flu vaccine due to unanticipated demand.