QUESTION: Fix punctuation: possible use sunscreen to protect the entire face and the neck
ANS: ...possible, use sunscreen to protect the entire face and the neck.

QUESTION: Fix punctuation: Passenger cars in households seasonally adjusted
ANS: Passenger cars in households, seasonally adjusted

QUESTION: Fix punctuation: If the symptom is mild cold therapy can help to reduce the swelling
ANS: If the symptom is mild, cold therapy can help to reduce the swelling.

QUESTION: Fix punctuation: The dream of conscientious doctors may be to put themselves out of a job by finding cures for every sickness and disease
ANS:
The dream of conscientious doctors may be to put themselves out of a job, by finding cures for every sickness and disease.