Answer:
Andrea's Immunity is high
Step-by-step explanation:
Immunity is the ability of organism's body to resist & fight the diseases, particular infectants, toxins, antibodies.
If person A has more immunity than person B : he / she would get sick less number of times, when they both are exposed to same disease causing infectants.
Cold, Viral Infections are common forms of antibodies infections. So, if Andrea doesn't get frequently ill despite of having exposed to ambience with frequent cold & virus outbreaks. And, She rather stays unaffectedly healthy, regular at work. All these imply that she has good immunity power, her body is better capable to resist & fight infections.