Hemilä et al., Pharmacology Research and Perspectives,
doi:10.1002/prp2.810 (Peer Reviewed)
Carrageenan nasal spray may double the rate of recovery from coronavirus and influenza virus infections: Re-analysis of randomized trial data
Individual patient data meta analysis of two RCTs showing nasal iota-carrageenan improved recovery rate and shortened the duration of long colds. There was a 71% reduction in the risk of long colds (>20 days). The increase in recovery rate was 139% for coronavirus infections, 119% for influenza A infections, and 70% for rhinovirus infections.
Hemilä et al., 6/14/2021, peer-reviewed, 2 authors.