The context of the following conversation is Sydney prevented the flu from spreading because she was able to get a flu shot at work.:
Sydney says My left arm is throbbing right now..
The friend responds I see you have a band-aid on your arm. Did you cut yourself?.
Sydney responds No, I got a flu shot at work today..
The friend responds That's good you're taking preventative measures..
Sydney responds Yes, I think it's best to prevent the flu from spreading this season given the unknowns of COVID..
The friend responds You should switch out your band-aid to a new one, since the current one is fraying..