New Long COVID studies demonstrate danger of breakthrough cases

Two new studies on Long COVID, published this week, provide an important reminder of the continued dangers this condition poses to people infected with the coronavirus—even after vaccination. Neither study provides wholly new information, but both are more comprehensive than many other U.S. papers on this condition as they’re based on large databases of electronic health records.

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New study demonstrates potential for measuring breakthrough risk

Adults with substance use disorders have an increased risk of breakthrough cases, according to a new study published this week in the journal World Psychiatry. Though the chances of a COVID-19 case after vaccination were very low in this group, these patients’ odds of a breakthrough case were about twice as high as the odds for adults without substance use disorders, researchers from the National Institutes of Health (NIH) found.

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