[geraneum]

In Persian, old times, snake was a symbol of health! Even today “sick” in Persian translates to “Snake-less”! I was also believed that snakes eat the animals that can carry dangerous sicknesses (small mammals) and their existence is a sign of healthy environment.

I am not sure if it’s related to the said logo but thought it might be interesting.

[pazimzadeh]

If snake is a symbol a health, why would sick mean "snake-less"?

[cercatrova]

If there are no snakes, it is likely there are small mammals around such as those that might have made you sick.