Although most employers were hesitant to implement vaccine mandates after the initial rollout of the COVID-19 shots, the still-surging pandemic (driven by the highly contagious delta variant) has caused many companies to rethink their position. Exemptions may be available, however, to those who can demonstrate a medical condition or sincerely held religious belief barring them from complying with any mandate. Determining an exemption’s exact parameters can be tricky, and employers can expect challenges, as recent headlines show.