Should he stop praying in the mosque because he fears for himself?

No File Exists
Check below answers in case you are looking for other related questions:
Salaried imam receiving a portion of zakaat collected
The evidence that it is obligatory to offer prayers in congregation in the mosque

No File Exists
Related Answers:
He prays in the mosque with the congregation but he is always on his own behind the last row
He lives in Europe and the mosque is far from his house; can he pray at home?
Ruling on prayer in congregation for men
Salaried imam receiving a portion of zakaat collected
The evidence that it is obligatory to offer prayers in congregation in the mosque

Recommended answers for you:
Ruling on shortening prayers whilst travelling
Purification and prayer for one who has urinary incontinence
She used to do the secret habit and did not do ghusl but she fasted and prayed
Will the prayers of one who drinks alcohol not be accepted for forty days?
Differences between semen (maniy) and urethral fluid (madhiy)