Community-based management of a five-arm randomised clinical trial in COVID-19 outpatients in South Africa: challenges and opportunities.

Background: Repeated COVID-19 waves and corresponding mitigation measures have impacted health systems globally with exceptional challenges. In response to the pandemic, researchers, regulators, and funders rapidly pivoted to COVID-19 research activities. However, many clinical drug studies were not completed, due to often complex and rapidly evolving research conditions.