Why inventing a vaccine for AIDS is tougher than for COVID

January 26, 2023
A nurse enrolls a participant in an HIV vaccine trial in Masaka, Uganda, an African-led project.

The 4-decades long effort to create an AIDS vaccine suffered a blow with news that a vaccine in a late stage trial was discontinued because results showed it to be ineffective. What are the obstacles?

(Image credit: Luke Dray/Getty Images)



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