Koenighofer et al., Multidisciplinary Respiratory Medicine,
doi:10.1186/2049-6958-9-57 (Peer Reviewed)
Carrageenan nasal spray in virus confirmed common cold: individual patient data analysis of two randomized controlled trials
Analysis of 2 RCTs concluding that carrageenan nasal spray reduced duration of virus-confirmed common colds, increased viral clearance, and reduced relapses.
Koenighofer et al., 1/1/2014, peer-reviewed, 8 authors.