The definition of "healthy" has changed a bit.
Titusville 16-year-old fighting COVID pneumonia in both lungs at Arnold Palmer ICU
Abby Chenoweth was a healthy 16-year-old. The Titusville teen took virtual school classes and wore a face mask when she left the house. Her mom said she didn't have pre-existing conditions, and she didn't go out often...
'Perfectly Healthy' 16-Year-Old Who Loved Photography and Video Games Died Suddenly from COVID-19
"I can't tell you how a perfectly healthy 16-year-old boy can be making his own peanut butter sandwich late Wednesday night ... and within 24 hours is fighting for his life," Dawn Guest said of her son Andre, who died in April...
There are many comorbidities that a person cannot do anything about such as having cancer but there are some comorbities whose harmful effects could be lessened, not easily but possible.