Life Sciences analysis: Ian Turner, senior associate, and Sarah Taylor, senior practice Development Lawyer at Pinsent Masons LLP offer insights into the mRNA coronavirus (COVID-19) vaccine patent dispute initially brought by Moderna against Pfizer and BionTech. The Patents Court held one of Moderna’s mRNA vaccine patents (EP (UK) 3 718 565 (‘EP565’)) to be invalid on the grounds of obviousness and added matter, but held a second patent (EP (UK) 3 590 949 (‘EP949’)) to be valid and, by admission, Pfizer/BioNTech’s coronavirus vaccine Comirnaty was held to be within the scope of the claims. The judge, Mr Justice Meade, also made some pertinent comments about case management where trials involve multiple patents and legal teams, and the instruction of experts. In a separate decision, the Patents Court held that Moderna’s pledge that it would not enforce its patents against those making coronavirus vaccines (the ‘Pledge’) amounted to an unusual partial defence to the infringement claim. The Pledge decision is not covered in this note.