The Financial Times (https://www.ft.com/content/a544c0de-7274-4831-b164-6059cd68d15c) published an article this week by a scientist who was involved in efforts to develop a vaccine for malaria about three decades ago. It’s a sobering read for anyone counting on a quick solution to the crisis posed by the Covid-19 pandemic. But it is also one that points to a hopeful picture irrespective of whether a vaccine is found.

As the writer, Richard Feachem, points out, the story is similar for HIV/Aids, despite billions of dollars having been poured into research since the 1980s. So the daily headlines about one study or another showing progress may be giving us false hope that a silver bullet will emerge out of the blue, and soon...

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