While there’s no definite time frame, it’s advised to be cautious when taking your baby out and about if they are vulnerable to infections. It’s also best to avoid people who have a cold or flu and be cautious, especially during winter months.
It's ok to let others know that your baby needs a bit more space in order to protect them. You can even make little signs to go on their stroller.
You may also find public areas too noisy for your baby, and it’s important to avoid being around anyone who is smoking.