Which of the following groups is affected by tobacco use? a. tobacco users b. society c. families of tobacco users d. all of the above

D. All of the above.
Everyone in the world is affected by tobacco use as we see the aftereffect it has. If it's our family we see the damages it does to their body and if we're the users we see the damage and the little things such as the bad smell and yellowing of teeth. If we're society we're forced to breath in air that has been polluted by tobacco smoke. 

D all above is correct

Well a pediatrician is a children’s doctor and a obstetrician is a doctor that delivers babies and cares for pregnant women.

Blood transfusions were rarely done and often fatal; they were outlawed until the nineteenth century.