Students at the University of Massachusetts Amherst will be required to receive a COVID-19 booster shot ahead of the spring semester, or obtain a medical or religious exemption, the school said Wednesday. The rule is similar to the university’s requirement that nearly all students be vaccinated against COVID to be enrolled for the fall semester. Only a few hundred students received exemptions for medical or religious reasons. ... UMass will require students to be tested between 10 and 14 days before the beginning of the spring semester, administrators said. The university will also continue a policy requiring face coverings indoors...