Michael Thompson, a 47-year-old executive recruiter from Illinois, United States expects his former wife to take him to court over vaccinating their two children against COVID-19.He doesn't trust the vaccine for children, but she wants to follow US health guidelines and have their eight-year-old and 10-year-old inoculated.It is a clash repeated among separated families across the US, where widespread vaccine hesitancy has thwarted efforts to end the pandemic despite injections being free