The country is considering mixing vaccines to help boost their effectiveness, but they have not approved use of any foreign vaccine.
"As you can imagine, my family and I miss my father enormously," the Prince of Wales said during his emotional appearance.
The 99-year-old Duke of Edinburgh took part in designing the modified Land Rover that will carry his coffin.
The Duchess of Sussex did not get medical clearance to travel alongside her husband.
The La Soufriere volcano covered parts of the Caribbean island in ash and forced thousands to evacuate.
Nearly all deliveries through the global program intended to help the world's poorest countries are blocked until as late as June.
A 1998 peace deal ended large-scale violence but did not resolve Northern Ireland’s deep-rooted Catholic-Protestant conflict.
Striking photos of Queen Elizabeth II's husband graced front pages around the world.
The no-fuss Duke of Edinburgh did not want a state funeral.
The Duke of Sussex will reportedly return to the U.K. for his grandfather's funeral.