I agree that they’re going to push for digital IDs and mobility restrictions.
It could be by using another disease but they seem to also be exploring forcing digital IDs using access to government services, carbon scores, universal basic income, and internet access.
None of these seem as “good” as using COVID. COVID was a good one because it forced registration and people accepted the quarantines and travel restrictions. Malaria doesn’t seem as good because it’s not transmitted person to person.
Vaccines these days seem to cause the birth rate to decline. They could be just using it for that purpose.