One of my friends has whooping cough, 4 girls spent the night in a tent. will we catch it, even if we all have the vaccine like she did?

Pertussis: It all depends on how old you are, when you had your last immunization and when she got the disease in relation to when you were exposed. Usually in a situation like this if she has a positive nasal swab for pertussis or whopping cough, all of her contacts will be advised to be treated with antibiotics by the health department. Check with your doctor.