Many private businesses, hospital systems and universities that require COVID-19 vaccines also offer religious exemptions. But with no consistent method for navigating these requests -- or defining the terms, for that matter -- leaders are scrambling to respond. Catholics who study or work at a Catholic college or university, for example, won't get far if they cite their faith as a reason not to get vaccinated, although they may have success making similar requests at secular institutions. Requests have been coming in nonetheless, says the Rev. Dennis H. Holtschneider, president of the Association of Catholic Colleges and Universities, which serves as a resource and voice for its 200 member campuses.