Okinawa, one of the blue zone regions, is highlighted due to its extreme longevity, plant-based diet, and now, the population’s resistance to COVID-19.
People in Okinawa, for example, consume a predominantly plant-based diet rich in phytochemicals and antioxidants… They also consume abundant green leafy vegetables and soy products, with minimal fat (about 6% of the total energy intake). In addition to their high life expectancy and low mortality from cardiovascular disease and certain types of cancers, Okinawans have enjoyed a remarkable resistance to COVID-19 mortality. As of June 16, 2021, the COVID-19 mortality in Okinawa, Japan, was 0.08% (163 deaths out of 19,782 cases), which is one-sixteenth that of Tokyo (mortality rate 1.3%; 2183 deaths out of 167,416 cases).
Can a Plant-Based Diet Mitigate the Risk of Severe COVID-19? — https://www.bluezones.com/2022/02/can-a-plant-based-diet-mitigate-the-risk-of-severe-covid-19/#
Journal Reference: Kahleova, H., Barnard, N.D. Can a plant-based diet help mitigate Covid-19?. Eur J Clin Nutr 76, 911–912 (2022). https://doi.org/10.1038/s41430-022-01082-w
lifeunderwriter.net 
I watched a documentary on this, and they also have great social connections and are extremely active. The island is hilly and the people walk and bicycle everywhere. The population also gardens late into their 90s and are out tending vegetables and flowers daily walking up and down hills and stairs. And getting together with extended family and friends to eat every day. Also older people are treated with great respect.
The lifestyle you describe shares the same qualities as the other Blue Zone areas on the planet. We all know it’s not just diet that contributes to longevity.
Loma Linda is the only one I know of in the United States.
Loma Linda Is the only one in the US. You get a Gold Star!
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Seventh day Adventists