The viral posts claim that “a single dose of a new experimental cancer drug caused a woman’s tumor to shrink dramatically within just 5 days, nearly vanishing from scans.”

Original review summary

The review says the claim combines and overstates findings from studies of dostarlimab and amivantamab. The treatments involved multiple doses, and reported responses took months for dostarlimab or about 6–7 weeks for amivantamab—not five days.[S1]