Chinese state media outlets are ramping up a propaganda campaign against so-called “vaccine nationalism” and findings that Chinese-made vaccines are much less effective than those made in the U.S. and Europe (which is actually the case).

The effort started in earnest after Brazillian authorities found in mid-January that China’s Sinovac vaccine was just 50.4% effective, barely passing the minimum requirement to be approved for use. Since then, state media outlets like CGTN, Xinhua and Global Times have gone on the offensive by questioning the efficacy of vaccines made by Pfizer, accusing Western countries of unfairly hoarding vaccines and, most recently, suggesting that China, not the West, is the only country concerned about vaccine access in poor, developing countries.