https://apnews.com/4753c485c75ee34268e1a7de918a7581 > WASHINGTON (AP) — Influential government advisers are deciding Thursday how best to expand the nation's COVID-19 booster campaign, including whether and when it's OK to “mix and match” brands for the extra dose. > The advisers to the Centers for Disease Control and Prevention are slated to discuss who should get extra doses of the Moderna or Johnson & Johnson vaccines — and the bigger question of getting a different brand for the booster than people's original vaccination.