Category: Vaccine Breakthrough

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