UK: 30% vaccine breakthrough rate reported by Covid App

According to ZOE COVID Study incidence figures, there are currently 51,961 new daily symptomatic cases of COVID in the UK on average, based on PCR and LFT test data from up to five days ago.  More...

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...

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...

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...

USA: 55% increase in Delta vaccine breakthrough cases in Washington State

This week’s update from Washington State showing vaccine breakthrough cases and which Sars-CoV-2 variant is causing them up to 11th August 2021.  More...

USA: 18.5% vaccine breakthrough in New Jersey

In a sampling of data from July 20 to July 26, fully vaccinated individuals accounted for 18.5 percent of new cases (803 of 4,332 new COVID-19 positive test results), but just three percent of all new hospitalizations (11 of 378) and no deaths (0 of 21).  More...