the only way you can protect your community and especially your elders is to get vaccinated
Not trying to be rude... But can you see how this kind of blanket statement would raise alarms in people with a history of abuse by authorities?
the only way you will be safe
This language is going to be immediately discredited in the minds of people from communities who have lived safely for eons without vaccinations.
And remember, "safety" is a subjective, relative term. Like so many people accept the risk and consider themselves safe without the vaccine. And others only consider themselves safe if they have it.
IMO the way you address this is to make a compelling argument vaccines grant people safer, healthier communities. No need to speak in absolutes. And dictate variable subjective terms.