Two molecules made from from the Quillay tree are ingredients in a new Covid-19 vaccine that could produce billions of doses for low- and middle-income countries.
Ricardo San Martin, a Chilean expert on the Quillay soapbark tree and its industrial uses, counts the seeds on a soapbark tree growing in the wild on the campus of the University of California in Berkeley, on Aug. 17, 2021.CASABLANCA, Chile — Down a dusty farm track in Chilean wine country, behind a wooden gate wrapped in chains, forestry experts are nursing a plantation of saplings whose bark holds the promise of potent vaccines.
With no reliable data on how many healthy quillay trees are left in Chile, experts and industry officials are divided on how quickly the supply of older trees will be depleted by rising demand. But nearly everyone agrees that industries relying on quillay extracts will at some point need to switch to plantation-grown trees or a lab-grown alternative.
Quillay producers and their customers say the harvest can continue for now without decimating the supply of older trees. Gonzalez said the company, where San Martin is a consultant, has built a new production plant and has the capacity to supply other interested pharmaceutical firms — all without harming the forests.“We want to start having very productive plantations, and we are working on that,” he said.
GSK’s highly successful vaccine against shingles, Shingrix, and several other promising experimental vaccines contain QS-21 supplied by Desert King. In a statement, GSK said it has “no specific challenges relating to sustainable supply” of QS-21.
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