NYC moms-subway question

Jenni

My baby is 8 weeks old, and it’s flu season so I don’t plan on bringing her on the train just yet but I may decide to take her every day come the fall because daycare might be en route to work, via train. Is that crazy? Should I just stick to one close to my home instead? When do we start taking our babies on public transport for small trips here and there, and then when can we do it on the regular? Opinions needed!