Found among the top three ranks in WHO’s priority list for pathogens, Klebsiella pneumoniae is one of those bacteria against which medical and scientific institutions around the world have struggled over the last few decades. In that time, it has evolved into some of the most virulent and antibiotic resistant microbes that infect humans. Some of these versions of K.pneumoniae, also called strains or genotypes, have been responsible for multinational disease outbreaks across the globe. Scientists and doctors around the world are also worried that microbes like K.pneumoniae might pose a greater risk to human health, after our struggles against COVID-19.