We are cruising on the Mardi Gras on 9-10-22. Our 3 year old son has had 2 shots of the Pfizer covid vaccine, not 3. Will he be required to take a pcr test before boarding, since he's not gotten his last shot? I have read the updated Carnival policy for cruises after 9-6-22, but am still a little confused about how it applies to toddlers & the 3 shot vaccine dosage.