<prompt> There is an outbreak of MRSA infection in a ward. What is the best way to control the infectionVancomycin given emperically to all the patientsFumigation of ward frequentlyWashing hand before and after attending patientsWearing mask before any invasive procedure in ICU  <response>: Hand washing, the oldest, simplest and most effective method of checking hospital cross an infection, which unfounately is often neglected. Ref: Ananthanarayan Paniker;s textbook of microbiology, 9th edition. 