@article{SMBlog:2021-04-02,
	author = {Steven M. Bellovin},
	title = {Vaccine Scheduling, {API}s, and (Maybe) Vaccination Passports},
	date = {2021-04-02},
	year = {2021},
	month = {April 2,},
	journal = {SMBlog: Steve Bellovin's Blog (blog)},
	url = {https://www.cs.columbia.edu/~smb/blog/2021-04/2021-04-02.html},
}