Unfortunately some countries require you wait the exact 180 days from the last dose. I signed up exactly on the day for my booster. Happy to have it behind me.

Unfortunately some countries require you wait the exact 180 days from the last dose. I signed up exactly on the day for my booster. Happy to have it behind me. By the way, scarcity of the doses is not really a problem -- my country has more than 20M doses in storage.