Experts Hope COVID-19 Vaccines Will Prove Safe and Effective, Yet Concerns Over Long-Term Effects Linger

At least one late-stage clinical trial will likely provide data to support the safety and efficacy of an emerging coronavirus disease 2019 (COVID-19) vaccine candidate by the end of this year, but there are concerns that the lack of long-term safety data and the rush to approve a vaccine before November could pose potential health risks to the public.