A bnAb derived from a case of HIV superinfection has distinct qualities from other HIV-specific bnAbs, including framework residues that contribute to neutralization breadth and a unique viral escape profile.
Heterotypic immunity, the ability of immunity induced by one SARS-CoV-2 variant to protect against another, is asymmetric, with the UK (B.1.1.7) variant, eliciting weaker heterotypic immunity than other variants.
Wide variation in cycle threshold (Ct) values from SARS-CoV-2 RT-PCR tests over calendar time offers the potential for their broader use in public testing programmes as an ‘early-warning’ system for shifts in infectious load and hence transmission.
PCR testing for SARS-CoV-2 from samples taken from smartphone screens, Phone Screen Testing, provides a sensitive, cost-effective, simple, and non-invasive new method that could boost COVID-19 mass test screening.
Broader case variation in respiratory viral load, and in shedding virus via droplets and aerosols, for SARS-CoV-2 than influenza A(H1N1)pdm09 facilitates greater transmission heterogeneity in the COVID-19 pandemic than the 2009 flu pandemic.