Tensions emerge over redefining the fully vaccinated

A debate is emerging around what it means to be fully vaccinated against COVID-19, as some state and local officials push to change the definition to include an additional dose of a coronavirus vaccine.

Governors in two states in the past week indicated they think three shots are necessary for full vaccination, but public health experts warn such a move would result in massive confusion, and a return to the piecemeal, scattered response that marked the early days of the pandemic.