Tracy suffered from chicken pox in her childhood. at the age of 25 she gets it again. however this time she recovers with minimal treatment or medication. this was possible due to

If Tracy has already suffered from chicken pox, it is likely that there are already antibodies in her system due to this exposure that will mean when she next catches it she will recover far quicker and without the need for such heavy medication.

Answerpoor public health services;

Grade point average. it's literally in the name