An AED can increase a cardiac arrest victim's chance of survival by 80% if used within how many minutes? a
3 minutes
b
5 minutes
с
7 minutes
d
9 minutes

So i have a lot of answers answered but it says i still need to answer more questions. why is it doing that? how many questions need to be answered?

Why would one lymph node in the neck be swollen and not the other? what causes them to swell?

If scientists are trying to use what they know about hsv to devise a means of protecting other people from being infected, which of the following would have the best chance of lowering the number of new cases of infection? a) vaccinate of all persons with preexisting cases of hsvb) interfere with new viral replication in preexisting cases of hsvc) treat hsv lesions to shorten the breakoutd) educate people about avoiding sources of infection