People 65 years or older in groups that have low vaccination rates are encouraged to get vaccinated.
(groups; have; low vaccination rates) (People 65 years or older in groups; are encouraged; to get vaccinated) (People 65 years or older in groups; to get vaccinated; )
groups People 65 years or older in groups People 65 years or older in groups
have are encouraged to get vaccinated
low vaccination rates
to get vaccinated