It's worrying me a lot too. You plan every detail but this could scupper everything. Must ring insurance to check covered just in case.
Heard on TV this morning that considering not re-opening schools in September for a month and that the number of cases is going to double week on week. We don't go till mid September so probability increases each week. As DS falls into high risk category its just another thing to lose sleep over.
After the rotten year we have had so far I won't believe we are going till that plane takes off - with us on it!