What causes sexually transmitted infections

Jake used to go surfing with his friends several times each week recently he has been spending a lot of time playing computer games what do you predict will be result of this change

Active immunity refers to: a. the defenses people are born with. b. temporary immunity granted from another source. c. immunity gained through immunization and exposure to diseases. d. natural immunities that protect humans from other animal diseases

Which a hammer strikes a compound formed by covalent bounds