UPDATE ON NOVEMBER 27, 2018
Based on new information, the CDC is narrowing its warning to consumers about romaine lettuce. You should not eat any romaine lettuce harvested from the Central Coastal growing regions of northern and central California. If you cannot determine where the romaine is from, do not eat it - throw it away. More information here: https://www.cdc.gov/ecoli/2018/o157h7-11-18/index.html
ORIGINAL POST ON NOVEMBER 21, 2018
Romaine lettuce is not safe to eat in any form, according to the CDC.
If you have any type of romaine lettuce in your home, throw it away and wash drawers and shelves where the lettuce was stored. Be sure to check if bagged/boxed salad mixes contain romaine. If you are unsure if a lettuce is romaine, throw it away.
Investigators are currently studying a new outbreak of illnesses caused by E. coli bacteria. They aren't sure where, when, or how the contamination happened yet, so, to be on the safe side, they are advising that all romaine lettuce be thrown out.