New Jersey on Saturday reported another 3,162 confirmedCOVID-19 cases and one new confirmed death, as U.S. regulators said they plan to forego authorizing a second booster shot for adults under 50 years old this summer. Instead, they will focus on revamping vaccines for the fall to target new viral subvariants. Eighteen of the 21 counties in the state are now considered high risk for transmission, the CDC reported Saturday, up from only six in mid-July. Only Mercer, Cumberland and Salem counties remain in the medium-risk category. Residents in high-risk counties are recommended to wear masks i…