so this article has some interesting commentary given this discussion
Should we track all breakthrough cases of COVID-19? - Harvard Health
A surprise move from the CDC
Considering all that could be learned from studying vaccinated people with breakthrough infections, the recent CDC announcement seems surprising. CDC experts recently decided to stop tracking all breakthrough cases, and to instead focus on those requiring hospitalization. The official reasons given for this included:
- Making cases of people who became sicker the priority allows the best use of resources.
- Mild cases are not burdening the healthcare system, and seem unlikely to pose a significant threat of spreading infection to others. This last point remains unproven, however; while some studies have found that the amount of virus carried by people with breakthrough infections is low, making them unlikely to be contagious, we know there have been exceptions.
- All the cases tracked from January through April of 2021 show no clear pattern that could advance our understanding of why they occur.
- The CDC continues to study vaccine effectiveness in certain groups of people (such as healthcare workers) who experience breakthrough infections, and is collecting all breakthrough data from certain designated states.
There could be other reasons for the CDC’s decision. First, there’s the challenge of messaging around encouraging people to get vaccinated. Focusing on breakthrough cases may send a misleading impression that the vaccines aren’t effective. This might complicate efforts to battle vaccine hesitancy.
Second, some experts believe that the value of tracking cases that are rare and generally mild is marginal. This may be shortsighted: after all, some people who have had COVID-19 report persistent symptoms like trouble with energy and attention, headaches, and shortness of breath. This is known as long COVID, or more formally, as post-acute sequelae of SARS-CoV-2 infection (PASC).
Third, it may be too hard to get reliable data from health departments or doctors all over the country. Until we have a national registry of all cases, and every person gets regular testing after vaccination, we may never get a good sense of how common breakthrough cases are — or why they happen.