Boris Johnson announces further nationwide lockdown

The transcript discusses the significant contributions of medical research from the UK and globally, highlighting the effectiveness of medical science in combating infectious diseases. It emphasizes the progress in COVID-19 treatment with dexamethasone, advancements in vaccine development, and innovations in testing approaches. The future outlook is optimistic, expecting these efforts to yield positive results in the coming months.

How has the expectation of scientific advancements changed regarding infectious diseases?

What are the three concrete advances in science mentioned in the text?