Here is one third of their total argument:
"There is no highly effective vaccine or antiviral treatment for coronavirus. A disease that can be eradicated must be either preventable or curable. Smallpox is preventable with a vaccine. Hepatitis C is curable with certain antiviral drugs. (Because of this, some in the biomedical community are pushing for the eradication of hepatitis C.) But a highly effective vaccine for COVID is unlikely, given that humans probably don't develop long-lasting immunity to coronaviruses. Besides, some vaccines are unimpressive to begin with. The 2017-18 seasonal flu vaccine, for instance, was merely 38% effective."
The other 2/3 overrides the existence of an effective vaccine.