About 1 million people are living with multiple sclerosis in the U.S., and about 10% of those have PPMS, making it the least common form of the disease.

Just for now, we wave goodbye to Max Verstappen, Lance Stroll, Esteban Ocon and Arvid Lindblad. Don't worry, though, they'll all be back out on Friday for the final running of this first week.

Lewis Hamilton says that "none of the fans are going to understand" some of the new rules introduced into F1 this year.

Reaction and analysis as Maro Itoje returns to England's starting XV for Saturday's Six Nations game against Scotland.