The lack of data around breakthrough infections is giving many Americans a false sense of security.

The Delta variant was first identified in the United States in April and by May it was well onto its exponential growth curve, doubling every 10-12 days, as the basis for Covid infections, now reaching over 96% prevalence. Ironically, on 1 May, the CDC announced it would stop monitoring post-vaccination breakthrough infections unless they led to hospitalizations or deaths. This decision can be seen as exceptionally ill-advised and has led to a country flying blind in its attempt to confront its fourth wave of infections – one that has rapidly led to well over 100,000 new cases per day and more than 60,000 hospitalizations, both higher than the US first and second pandemic waves. It is unfathomable that we do not know how many of these are occurring in people who were vaccinated.

Read the full article in The Guardian.