Why do you think we wash our hands after toilet usage?
It's not because touching your own genitals, urine or even faecal matter will make YOU ill. You are most probably clean to yourself. We promote the habit because if we all do it, we are much less likely to make each other ill.
Same goes for infectious diseases. You wash your hands because even though you might have a healthy immune system (as do I), some of my colleagues might not. Or my grandma. Or in fact some random person I shake hands with.
The concept of herd immunity doesn't just apply to vaccinations. We do keep clean for others.
Why do you think we wash our hands after toilet usage?
It's not because touching your own genitals, urine or even faecal matter will make YOU ill. You are most probably clean to yourself. We promote the habit because if we all do it, we are much less likely to make each other ill.
Same goes for infectious diseases. You wash your hands because even though you might have a healthy immune system (as do I), some of my colleagues might not. Or my grandma. Or in fact some random person I shake hands with.
The concept of herd immunity doesn't just apply to vaccinations. We do keep clean for others.