People infected with the original strain of the virus that causes COVID-19 early in the pandemic produced a consistent antibody response, making two main groups of antibodies to bind to the spike protein on the virus's outer surface. However, those antibodies don't bind well to newer variants, a new study found. "Antibody response is quite relevant to everything from understanding natural infection and how we recover from infection to vaccine design. The body has the capability to produce diverse antibody responses—it's estimated we could make a trillion different antibodies. So when you see people are making quite similar antibodies to...