Prevalence of persistent SARS-CoV-2 in a large community surveillance study.
Level 3 - non-randomized controlled study
Prospective longitudinal community surveillance cohort study tracking viral shedding and sequencing.
PubMed 38383783 · doi:10.1038/s41586-024-07029-4
What was done
Using viral sequencing and PCR data from a large national infection survey, researchers identified individuals with high-titre SARS-CoV-2 RNA persisting for extended periods. They characterized viral load kinetics, evaluated viral genome evolution for selection pressures, and examined the association between persistent infection and self-reported post-acute sequelae (long COVID).
What was found
The study identified 381 individuals with high-titre viral RNA persisting for at least 30 days and 54 individuals persisting for at least 60 days. The authors estimated that 0.1% to 0.5% of SARS-CoV-2 infections become persistent, lasting 60 days or longer with typically rebounding high viral loads. Individuals with persistent infection had more than 50% higher odds of self-reporting long COVID compared to those without persistent infection. Viral sequencing revealed that some individuals accumulated multiple amino acid substitutions (including variant-defining mutations and monoclonal antibody target sites), while others showed no consensus sequence changes over prolonged periods.
Why it matters
This study provides community-level prevalence estimates for persistent SARS-CoV-2 infections, showing that viral persistence occurs in the general population outside of severe hospital settings, links to long COVID symptoms, and can serve as a reservoir for viral evolution and immune-escape mutations.
Limits
The total survey sample size is not stated in the abstract. Viral replication could not be definitively distinguished from non-replicating RNA persistence in all participants. Long COVID outcomes relied on self-report rather than clinical diagnostic evaluation.
Cited by
- supports Replicating SARS-CoV-2 virus persists in the bodies of individuals months or years after recovery from acute infection, contributing to long COVID.