The Canadian Association for HIV Research (CAHR) extends its condolences to the family, friends and many colleagues of Dr. Mark Wainberg, whose passing comes as a shock to the HIV research community. One of the founding members of CAHR, Dr. Wainberg was also Past-President of CAHR, a veteran leader in the fight against HIV/AIDS and well-known for his involvement in 1989 in the vastly important initial identification of lamivudine (3TC) as an antiviral drug. A mentor to many, his ongoing commitment to the cause will be sorely missed.