Most software adjacent employers maybe. Service industry would rather have you sneezing into customer's food (as long as the health inspector isn't currently there) than have to reconfigure the schedule.

In California people are guaranteed 3 days. That’s not much when dealing with a flu-like illness. Additionally, it gives employers the right to cap the number accrued to 6 days.

My employer resets sick days to 0 at the beginning of the year, and you have to accrue them over time. I was sick very early in January and they were unhappy about it.