I used the wrong word! Most data shows people who have a truly asymptomatic infection do not frequently spread the virus. But much if not most of the transmission occurs from infected people while they are pre-symptomatic. Hence the ease of spreading the diseases, and the push by many health agencies to get people with no symptoms to wear masks and social distance in case they are infected but don't know it yet.

Here's a couple relatively recent links: https://wwwnc.cdc.gov/eid/article/27/4/20-4576_article

https://www.health.harvard.edu/diseases-and-conditions/most-...