Imagine a cut on your hand gets infected. It gets hot, swollen, painful – but it means your immune system is fighting off that infection. Now imagine that happening throughout your entire body because the infection spread everywhere through your bloodstream. This is sepsis – a life-threatening blood infection. Read on to learn what we know and don’t know about sepsis, the link to COVID-19, and why we’re entering a new era of heightened interest in sepsis research.