Everybody must keep social dinstancing.
Social distancing must be kept.
You must use the back of your arm when sneezing.
The back of your arm must be used when sneezing.
Students have to wash their hands often.
Hands have to be washed often. / Students' hands have to be washed often.
You shouldn't touch your face.
Your face shouldn't be touched.
You must stop handshakes.
Handshakes must be stopped.
Families can use video conferencing instead of face-to-face meetings.
Video conferencing can be used instead of face-to-face meetings (by families).
People can wear face masks when they leave their houses.
Face masks can be worn if people leave their houses.