I'm sorry to have to bring up Covid again, but we are scheduled to be on the Westerdam on September 4. My husband and I are travelling with our daughter and my mother-in-law. According to my daughter, my MIL cannot be vaccinated due to her chemo treatments. Does HAL allow any kind of waiver for people who cannot be vaccinated? My daughter is currently out of the country and is planning to try and get in touch with HAL on Monday. I was just wondering if anyone had experience with this. Please be kind with answers. I don't know anything about cancer and possible problems with the Covid vaccine, and I can't believe my daughter hadn't checked on this before now (she's in charge of my MIL's reservation).