1. Virus structure and life cycle 2. Epidemiology of covid-19 3. Structural biology of sars-cov-2 4. Sars-cov-2 variant biology and immune evasion 5. Covid-19 pathogenesis 6. Long covid 7. Innate immune responses to sars-cov-2 8. B cell responses to sars-cov-2 9. T cell responses to sars-cov-2 10. Future insights