Ok so here I am agin asking questions

My brother currently has COVID he should be around Day 9 or Day11 of quarantine

Anyways he completely isolated him from the rest of the household members. We even duck taped a plastic barrier on his door and the hall way which separates his room from the rest of the house.

Anyways we are on our toes while he comes out from quarantine.

Anyways here’s comes my question: is it really necessary for us ( as in me and my mom) to quarantine? FYI **We have ZERO symptoms and we have already gotten tested twice (5 days separate) and tested negative on both test***

Reason I’m asking is because me and my mom have no one to depend on to bring us things we need from outside