Health officials are reminding those who are vaccinated for COVID-19 they still need to wear a facial covering and maintain social distancing. Hood River County Health Officer Dr. Christopher Van Tilburg explains in a Facebook video released Sunday one of the reasons for that is the way the vaccine works, with people inoculated with the virus so the body recognizes it and fights it off. Van Tilburg says they believe the risk of transmission is low, but not zero. He also says while the efficacy of the vaccines are very high, they can fail, and there are worries about variants of the virus.