From July to September 2019 passengers aboard several cruises sailing on 10 ships in Europe were infected with norovirus. The cruise line was unnamed in an investigative report.

The CDC's Vessel Sanitation Program (VSP) was notified and conducted an investigation.

Voyage 1 - September 02-September 23 voyage aboard "Ship A" from Germany to New York City, 117 passengers were ill, 8 crew members, 3 stool specimens were positive for norovirus; No outbreak source was identified.

Voyage 2 - October, "Ship B" sailing from New York City along the Eastern Seaboard, 85 passengers ill, 10 crew members ill, 5 stool specimens were positive for norovirus.

Voyage 3 - October, "Ship A" sailing from Montreal to New York City, 83 passengers ill, 10 crew members ill, 2 stool specimens were positive for norovirus

During the field investigations, the cruise line's public health officials reported to VSP that after reviewing food questionnaires completed by ill passengers on Ship B, a smoothie made from frozen fruits and berries was implicated as the source of the outbreak. The FDA tested 16 frozen fruit and berry items. Three items tested positive for norovirus: raspberries (Norovirus Genogroup II), tropical fruit (Norovirus Genogroup I), and berry mix (Norovirus Genogroup I). Norovirus sequences from the stool samples and from raspberries were 97.5% similar. After removal of the fruit items, no further outbreaks were reported by the cruise line.