Natural immunity is durable and robust.
The vax is failing and Pfizer is under 40% effectiveness.
Look at Israel. The vaxed are stacking up at the hospitals and dying.
This study can not apply to the vax. T-cell immunity is durable for natural immunity.
This study is suspect.
Summary of study does not say if there was a control group or whether those studied were controlled by social class. Without control group it is likely T cells are produced without the Vax. And if the study was done of people who do not smoke, drink alcohol or are diabetic, it is useless. Blood sugar and insulin is a wild card that can change the body response to anything. I wonder who paid for the study?