VICTORIA—British Columbia’s top doctor says the first dose of a vaccine for COVID-19 gives “amazing” immunity, so the government’s decision to allow for a 35-day gap before the second dose is administered is rooted in science. Dr. Bonnie Henry’s statements come as B.C. recorded a grim milestone Monday, reaching 1,000 COVID-19 related deaths. She says the decision to delay the second shot is about maximizing the vaccines’ distribution while balancing the supply and making sure the province has a safe and effective immunization program. Henry says the first dose primes the immune system while the second shot gives it a boost and waiting between jabs allows the body to build up that immunity. B.C. recorded 22 more deaths over a three-day period for toll of 1,010, while there were 1,475 new infections over the same period. The number of active cases in B.C. has dipped to 5,220 and nearly 60,000 …