Which challenges do countries face in limiting the spread of communicable diseases?

lack of available healthy food
increase of worldwide travel
decrease of available clean water
increase in migration of infected animals

Many1. why should teens be aware of health issues such as healthy sexuality, dealing with conflict, healthy decision making and cpr? 2. a) what are the 3 most important aspects/skills to learn in order to play volleyball activity well? b) explain how each aspect/skill is important when playing the game. c) describe 2 points of strategy you could use to you be successful at this activity.