NEW YORK (AP) — U. S. health officials stopped the publication of a study on whether the COVID-19 vaccine was keeping adults from becoming sick enough to have to go to the hospital. A U. S. Department of Health and Human Services spokesman on Wednesday confirmed the decision to halt publication, citing a dispute about the study's methodology. The research paper was to appear in Morbidity and Mortality Weekly Report, the Centers for Disease Control and Prevention's flagship publication. One a...