Communicable diseases can be prevented by:​

Proper handwashing, especially before and after handling food and using the toilet, helps keep germs at bay. Other important ways to slow or stop disease transmission are by ensuring the food we eat and water we drink is safe, avoiding people who are sick and practicing safe sex.

for me i have felt invisible when i was clearly struggling,or,i made a great achievement ,and,nobody took to notice me either because they just didn't see it,or,people just turned their back on me.i can see a person being invisible by choice,or,without choice like i did.the people who are invisible by choice don't try to talk to people,don't try to make friends,and,keep to themselves.i haven't been one of those people so i couldn't give you a reason.

hope this and can i get bainliest my dude : d