In a milestone moment for the US, a critical care nurse in Long Island has become the first person in the country to receive the Covid-19 vaccination.
Sandra Lindsay works as an intensive-care nurse at Long Island Jewish Medical Center in Queens.
A massive logistics effort is underway to distribute millions of vials of the Pfizer/BioNTech vaccine around the country.
The US is grappling with the world's highest death toll, which is expected to exceed 300,000 deaths on Tuesday.
Washington correspondent Simon Marks speaks to Susie Ferguson.
