Medical Experts Cautiously Optimistic With COVID-19 Vaccine Trial Underway
![Medical Experts Cautiously Optimistic With COVID-19 Vaccine Trial Underway](https://video.newsserve.net/700/v/20200728/2007280341-Medical-Experts-Cautiously-Optimistic-With-COVID-19-Vaccine.jpg)
Medical Experts Cautiously Optimistic With COVID-19 Vaccine Trial Underway
There's concern over a new coronavirus cluster in New Jersey, where at least three dozen lifeguards tested positive.
Meanwhile, the nation's largest trial for a COVID-19 vaccine took another big step Monday.
CBS2's Jessica Layton reports.