But yes, you're right, the science is not clear on transmission rates with vaccinated people.
It will also be outside/on screened-in porch.
I'm lucky in that my immediate and extended family take this very seriously, so we all wear masks and practice social distancing with no qualms.
If someone for some reason cannot be vaccinated by the time of the reunion, we've all agreed they should not attend out of an abundance of caution.
