Dengue fever will become a major threat in the southern United States, southern Europe and new parts of Africa this decade, the WHO's chief scientist said, as warmer temperatures create the conditions for the mosquitoes carrying the infection to spread.
There's work being done on something better still.
https://iepi.mcmaster.ca/research/pillars-of-research/innovation-emerging-technologies/research-syntheses/transmissible-vaccines/
"Transmissible vaccination is a type of inoculation that targets wild animals and can spread between hosts autonomously, with the goal of preventing transmission of animal pathogens to human populations."
The wet nightmare for conspiracy bullshitters.
Do you want zombie apocalypse? Because that's how you get zombie apocalypse.