Rethinking public health campaigns in the COVID-19 era: a call to improve effectiveness, equity and impact - Faisal Shuaib; Luwei Pearson; Anuradha Gupta; Katherine O'Brien; L Kendall Krause; Hamid Jafari; Kristin N Saarlas; W William Schluter; Marcos Espinal; Kashef Ijaz; Christopher Gregory; Scott Filler; et al. (BMJ Global Health)