Original sentence: <ref name="barrington"> He opposed measures against the coronavirus such as lockdowns, contact tracing and mask mandates.In 2020, Kulldorff was a co-author of the Great Barrington Declaration, which advocated focused protection of vulnerable groups while letting lower-risk groups develop herd immunity through natural infection
Edited sentence: He opposed measures against the coronavirus such as lockdowns, contact tracing and mask mandates.In 2020, Kulldorff was a co-author of the Great Barrington Declaration, which advocated letting COVID-19 spread with the goal of herd immunity while attempting to protect higher-risk groups