Had my first AC 3 days ago

I'm sorry you have had some nausea. I was very lucky and never had nausea, and never needed anti-emetics. My immunity was never very bad. Chemo is different for each us, and not predictable. Working from home is safer, if you can do that. Generally we are told to be very careful as we are immunocompromised. But you can also be guided by your blood results. The White Blood Cell count usually falls. But some of us have this worse than others. Mine did not drop dangerously low. Time will tell how you go.  Of course use ordinary precautions, handwashing, sanitiser, and mask wearing when possible. If the weather is good, eating alfresco is better. All the best, I hope that you enjoy lunch, and the rest of your Chemo is uneventful.