Table 3.

Tools from Google search and expert suggestions.

Digital gamified tool	Type of disease/vaccine	Type of digital gamified tool platform	Gamification elements (eg, rewards, role-playing, leaderboard, serious game)
Antidote COVID-19 [71]	COVID-19	Native mobile app	Reward points
The Vaccination Game [72]	H11N7 and influenza	Web-based tool	Serious game
Help take down COVID-zilla! [73]	COVID-19	Web-based tool	Role-playing
Just the Vax! [74]	Vaccine-preventable disease	Web-based tool	Reward points
COVID Invaders [75]	COVID-19	Web-based tool	Reward points
Vax Pack Hero [76]	Vaccine-preventable disease	Web-based tool	Reward points and physical trading cards
Flu's Clues [77]	Influenza	Web-based tool	Certificate of completion for solving the influenza mystery
Virus Fighter [78]	COVID-19, influenza, Ebola, measles	Web-based tool	Serious game
Immunization411: for preteens and teens’ online training [79]	Tdap meningococcal vaccine, varicella, HPVa, influenza	Web-based tool	Reward points
COVID Chronicles [80]	COVID-19	Web-based tool	Reward points
I Boostb [81]	Vaccine-preventable disease	Web-based tool	Quiz

^aHPV: human papillomavirus.

^bSuggested by an expert.