The Food and Drug Administration was allowed to participate in the World Health Organization's meeting this week on updating influenza shots, officials for the U.N. agency said, despite an order by President Trump last month banning government employees from working with the WHO. The administration has granted some exemptions to the order.

Flu vaccine makers may face a last-minute scramble to produce enough doses after an FDA advisory committee meeting was abruptly canceled.

The Food and Drug Administration unexpectedly canceled an annual meeting of its advisers to update next season's influenza vaccines, raising concerns about the timeline for manufacturing next winter's flu shots.