New Jersey on Saturday reported another 15 confirmedCOVID-19 deaths and 696 positive tests as the number of residents who have received the initial course of vaccinations across the state topped 6.8 million. The latest numbers also come on the heels of a major study that reveals even a mild case of COVID-19 can significantly affect the brain. “I think this is the beginning of the story, but we need to see more,” said Dr. Kyra Blatt, a neurologist with RWJ Barnabas Medical Group, regarding the study, which appeared in the journal Nature. “We want to see more with the variants we have now. We wa…