PHYLLIS

AM ATTACHING AN ARTICLE TO THE HOMEWORK AND BASED ON THAT ARTICLE I NEED THIS 2 BULLETS ANSWERED; EACH BULLET NEEDS TO BE 250 WORDS EACH THEY HAVE TO BE ANSWERED SEPERATELY BASED ON THE ARTICLE. I NEED THIS BY SUNDAY….

•  Describe the conditions that must be met before epidemiological researchers can infer a cause-and-effect relationship.       
•  Describe the study's strengths and limitations in terms of epidemiological research.