This could be a good argument for getting people vaccinated even if they feel they aren't at risk and their families have already been vaccinated. If the virus is allowed to circulate in any form, it risks mutating into a form that will bypass any vaccine, rendering it ineffective, meaning even vaccinated individuals are at risk.
It won't work on true anti-vaxxers but it could convince people who are merely indifferent or think they themselves aren't at risk.