DAVID WAHLBERG Wisconsin health officials have repeatedly declined to say how many residents have acquired COVID-19 after being fully vaccinated, even though theyâre tracking such âbreakthroughâ infections and federal officials have reported more than 7,000 cases nationally. A new clinical study shows the Johnson and Johnson vaccine is about 66 percent effective against moderate to severe COVID-19.That also includes variants. It's the same number the company released earlier this year.Right now the Johnson and Johnson COVID-19 vaccine is on pause in the U.S. beca...