(Reuters) - Pfizer has been sued by Texas Attorney General Ken Paxton, who on Thursday accused the drugmaker of misrepresenting the efficacy of its widely-used COVID-19 vaccine. In a complaint filed in a Lubbock County state court, Paxton said it was misleading for Pfizer to claim its vaccine was 95% effective because it offered a "relative risk reduction" for people to who took it Paxton said the claim was based on only two months of clinical trial data, and vaccine recipients' "absolute risk reduction" showed that the vaccine was just 0.85% effective. He also said the pandemic got worse even...