In the last six-seven days, a stream of good news on the COVID-19 vaccine front has been pouring in. Many leading vaccine candidates for COVID-19 have shown promising results.On Monday, there was news from Oxford University and British Pharma Giant AstraZeneca’s joint vaccine candidate – ChAdOx1 nCoV-19.On Tuesday, China’s CanSino and Germany’s Pfizer BioNtech published the results of their early trials, and last week, US biotech firm Moderna’s experimental vaccine – mRNA-1273 – showed promising results.In this episode of daily updates on the coronavirus pandemic, we will look into the preliminary results of these vaccine candidates in detail.