Avoid any words which may imply a bias in the results: negative, positive, good, bad, benefits, harms, effects, and so on. Remember, you are searching for a balanced treatment of the question. Using biased or leading terms could skew the results of your search.
Consider what would happen if you included the term “anti-vaxxer” in your search. You would most likely end up on websites with inaccurate information.
ACTIVITY: Focus on the Keywords of a Research Question