https://english.alarabiya.net/en/features/2020/03/25/Coronavirus-Iceland-s-mass-testing-finds-half-of-carriers-show-no-symptoms says half the carriers show no symptoms.
Note: half of carriers don’t show symptoms at the time they tested positive, could well be that they show symptoms later.
On the Diamond Princess it was reported that 20% of positives never showed symptoms, and Korea is reporting 30%. So some of those asymptomatics will probably progress, but not all.
https://english.alarabiya.net/en/features/2020/03/25/Coronavirus-Iceland-s-mass-testing-finds-half-of-carriers-show-no-symptoms says half the carriers show no symptoms.
Note: half of carriers don’t show symptoms at the time they tested positive, could well be that they show symptoms later.
On the Diamond Princess it was reported that 20% of positives never showed symptoms, and Korea is reporting 30%. So some of those asymptomatics will probably progress, but not all.