FDA chief apologizes for overstating plasma effect on virus

WASHINGTON (AP) — Responding to an outcry from medical experts, Food and Drug Administration Commissioner Stephen Hahn on Tuesday apologized for overstating the life-saving benefits of treating COVID-19 patients with convalescent plasma.

Scientists and medical experts have been pushing back against the claims about the treatment since President Donald Trump’s announcement on Sunday that the FDA had decided to issue emergency authorization for convalescent plasma, taken from patients who have recovered from the coronavirus and rich in antibodies.

Trump hailed the decision as a historic breakthrough even though the treatment’s value has not been established. The announcement on the eve of Trump’s Republican National Convention raised suspicions that it was politically motivated to offset critics of the president's handling of the pandemic.

Hahn had echoed Trump in saying that 35 more people out of 100 would survive the coronavirus if they were treated with the plasma. That claim vastly overstated preliminary findings of Mayo Clinic observation.

The 35% figure drew condemnation from other scientists and some former FDA officials, who called on Hahn to correct the record.

“I have been criticized for remarks I made Sunday night about the benefits of convalescent plasma. The criticism is entirely justified. What I should have said better is that the data show a relative risk reduction not an absolute risk reduction,” Hahn tweeted.

The FDA made the decision based on data the Mayo Clinic collected from hospitals around the country that were using plasma on patients in wildly varying ways -- and there was no comparison group of untreated patients, meaning no conclusions can be drawn about overall survival. People who received plasma with the highest levels of antibodies fared better than those given plasma with...