Category: Delta

Having SARS-CoV-2 once confers much greater immunity than Pfizer vaccine

“The natural immune protection that develops after a SARS-CoV-2 infection offers considerably more of a shield against the Delta variant of the pandemic coronavirus than two doses of the Pfizer-BioNTech vaccine, according to a large Israeli study that some scientists wish came with a “Don’t try this at home” label.  More...

Coronaheadsup.com Asia, B.1.617.2, Coronavirus, Delta, Infection, Israel, Pfizer/Biontech, Transmission, Vaccine, Vaccine Breakthrough, Vaccine Waning, Variants

UK Covid app confirms vaccines are waning

Joinzoe: “We found that initial protection against infection a month after the second dose of the Pfizer vaccine was 88%, while after five to six months this fell to 74%.   More...

Coronaheadsup.com Alpha, Astrazeneca, B.1.1.7, B.1.617.2, Coronavirus, Delta, England, Europe, Infection, Northern Ireland, Pfizer/Biontech, Reinfection, Scotland, Transmission, UK, Vaccine, Vaccine Breakthrough, Vaccine Waning, Variants, Wales

CDC: 25% vaccine breakthrough in Los Angeles County up to July 2021

During May 1–July 25, 2021, among 43,127 SARS-CoV-2 infections in residents of Los Angeles County, California, 10,895 (25.3%) were in fully vaccinated persons, 1,431 (3.3%) were in partially vaccinated persons, and 30,801 (71.4%) were in unvaccinated persons.  More...

Coronaheadsup.com B.1.617.2, California, Coronavirus, Delta, Hospitalization, Infection, Janssen, Moderna, Pfizer/Biontech, Testing, Transmission, USA, Vaccine, Vaccine Breakthrough, Vaccine Waning, Variants

The future of Sars-CoV-2: Multiple vaccine breakthrough infections in one patient

The patient had three RT-PCR confirmed SARS-CoV-2 infections. Two breakthrough infections occurred in quick succession with the first over 3 weeks after complete vaccination with COVISHIELD and despite post-vaccination seroconversion.  More...

Coronaheadsup.com Alpha, B.1.1.7, B.1.617.2, Coronavirus, Delta, Evolution, Herd Immunity, Hospitalization, Infection, Long Covid, Symptoms, Testing, Transmission, Vaccine, Vaccine Breakthrough, Vaccine Waning

UK: Vaccine breakthrough rate for Delta infections still increasing

The latest UK PHE Technical Briefing has just been published, and it shows that the vaccine breakthrough rate for Delta infections in the UK continues to increase by about 6% per month.  More...

Coronaheadsup.com Alpha, Astrazeneca, B.1.1.7, B.1.617.2, Coronavirus, Deaths, Delta, England, Hospitalization, Infection, Moderna, Northern Ireland, P.1, Pfizer/Biontech, Scotland, Side Effects, UK, Vaccine, Vaccine Breakthrough, Vaccine Waning, Wales