offitt: thank you.: thank you, amna. ♪ geoff: the fda has canceled a critical meeting of flu vaccine experts, making this the second vaccine policy meeting to be canceled since robert f. kennedy jr. took over as secretary of health and human services. the annual gathering is key. federal health officials must decide in advance which strains to target in the next vaccine since production takes months. it comes amid one of the worst flu seasons in 15 years, with more than 19,000 deaths according to the cdc, nearly 100 of them children. we're joined by dr. paul offitt, one of the fda committee advisors and director of the vaccine education center at children's hospital of philadelphia. it is good to see you. so why was this meeting in particular so critical, and why did the fda cancel it? what justification did they give? dr. offitt: it is critical because it takes about six months to make this vaccine. so every march we meet with representatives from the world health organization, department of defense an