The population prevalence of SARS-CoV-2 antibodies in Santa Clara County implies that the infection is much more widespread than indicated by the number of confirmed cases. Population prevalence estimates can now be used to calibrate epidemic and mortality projections.
21 April: “Encouraging signs” that Sweden’s approach is working, and will work over the longer term. Sweden’s authorities proposed a liberal approach based on individual responsibility because it can be tolerated for longer and it has the effect of ‘flattening the curve’.
Professor Carl Heneghan, director of the centre for evidence-based medicine at Oxford University, told Radio 4’s Today programme: “In fact, the damaging effect now of lockdown is going to outweigh the damaging effect of coronavirus.”
Study led by John P. A. Ioannidis, Stanford University, finds people <65 years old have very small risks of COVID-19 death even in the hotbeds of the pandemic and deaths for people <65 years without underlying predisposing conditions are remarkably uncommon. Concludes that strategies focusing specifically on protecting high-risk elderly individuals should be considered in managing the pandemic.
Data and case – world map. Updated.
A risk and vulnerability chart by David L. Katz, founding director (1998-2019) of Yale University’s Yale-Griffin Prevention Research Center, shows how a non-lockdown system would protect vulnerable people from Covid19.