Virus in brief: Wis. cases and deaths rise; Survivors donate blood as possible serum; Stores announce entrance restrictions

By Shereen Siewert As cases and deaths blamed on the novel coronavirus in Wisconsin continue to creep upward, doctors around the world are studying whether infusions of blood plasma packed with immune molecules that helped survivors beat the disease will help treat new infections. State officials on Saturday said 2,112 Wisconsin residents have tested positive […]