At Mass, Bishop Richard J. Malone is asking people to use common sense if they have a cold and/or flu symptoms, or are concerned about catching the flu, to please refrain from the option of drinking from the chalice and/or shaking hands at the sign of peace. They can simply nod their head and say, "Peace be with you," to the people around them if they have a cold or the flu symptoms.
Receiving the Blood of Christ from the chalice is always an option, but reception of it is not required.