Hi Mary
Her doctor will most likely halt chemo until her WBC count rises, which no one really knows how long that will take as each person is different. Though those shot (I'm assuming you mean Nuelasta?) help, they cannot prevent all the damage doen by the chemo meds and that is why her doctor doe routine blood tests.
I would recommend that in addition to taking the antibiotics, that she also take a multi vitamin and load up on C and maybe Zinc (but run it by the dr to make sure) as vitamins will help boost a healthy immune system. Also as long as she is in treatment I would avoid sick people, carry hand sanatizer gel, and possibly kids from like daycare or camp that are like walking germs. unfortunatly some of these precautions may be necessary in order for her to complete her treatment. Another factor in her recovery time will be if she is eating well and getting plenty of rest.
Hopefully by following the above she will be able to stay healthy enough to finish chemo in a timely manner.
Good luck!
Angi