Can you show me a link to what percentage of those exposed in the ocean linear needed hospitalization? I haven't seen any direct discussion of this and that the situation in question. Sure many can be asymptomatic but that doesn't imply the symptomatic group doesn't tend to get very ill.
Edit: I should have said "a large enough group of asymptomatic to push the fatality and sickness rate way".
Yes, there can a majority asymptomatic but that doesn't mean that 20% of the overall don't wind-up needing serious medical attention also.
Hopefully, you can read the comment I replied to and see the context