Dear Miss Manners: My husband and I are expecting our second child. When I delivered our son, before the pandemic, there were no restrictions on visitors at our hospital, and any required and routine vaccinations were not an issue, despite known political differences among our family members. Now, things have changed. My husband’s father, sister and her entire family refuse to be vaccinated against the coronavirus, despite several cases in the family — including our son, who was too young to be vaccinated and ended up at the hospital via ambulance. My husband and I are both very confrontation-averse, but...