Here's a paper from last year: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9321237/
Yes, it's Omicron, but 32.4% asymptomatic infection is not very rare.
Asymptomatic carriers are 75% as infectious as symptomatic individuals: https://jamanetwork.com/journals/jamanetworkopen/fullarticle...