Sanofi has been reprimanded by a UK trade group for making misleading claims about its RSV vaccine. The group accused her of disparaging a competing product from Pfizer. Sanofi broke the rules by spreading false information about the Pfizer vaccine. The criticism relates specifically to claims that portrayed the Pfizer vaccine in a bad light. A UK trade group has issued an official reprimand. This case highlights the violation of ethical standards in drug advertising. Sanofi must adhere to accurate facts about the competition in the future.