Vaccination alone won’t stop the rise of new Covid-19 variants and in fact could push the evolution of strains that evade their protection, researchers warned Friday. They said people need to wear masks and take other steps to prevent spread until almost everyone in a population has been vaccinated.
People who have recovered from Covid-19 are around 9% of Israel’s population, but they’re less than 1% of current cases. That has led to speculation that recovery from past Covid is more protective against infection from the Delta Variant than vaccination. Known recovered people in Israel are mostly not vaccinated, though some chose to get a single booster dose
“There could be other explanations for this result. The Delta wave is, for now at least, not affecting the communities hardest hit by Israel’s previous Covid waves: Ultra Orthodox Jews and Israeli Arabs. So perhaps recovered people aren’t being exposed to the virus yet.
But I’m not sure that’s enough to explain the sharp difference. From data I was passed last week, recovered people were testing at only 0.1% positivity, compared to more than 1% for vaccinated people.
It’s clear that Delta is spreading in Israel’s vaccinated population. Vaccinated people are getting Delta, and — critically — vaccinated people are giving Delta to other vaccinated people.”
There are currently 15,537 new daily symptomatic cases in partly or fully vaccinated people, an increase of 40% from 11,084 new cases last week. It is estimated that among unvaccinated people in the UK there are currently 17,581 new daily symptomatic cases of COVID on average, based on PCR test data from up to five days ago, a decrease of 22% from 22,638 last week. The overall number of estimated cases is 33,118 which remains similar to last week’s figure which was 33,723.
With cases in the vaccinated group continuing to rise, the number of new cases in the vaccinated population is set to overtake the unvaccinated in the coming days.
Update to this story:
Yesterday Anthony Fauci, MD, the chief White House medical adviser and National Institute of Allergy and Infectious Diseases director, appeared on CNN’s “State of the Union” and said he stands by the CDC and FDA’s assertion that the current available data do not support the need for boosters.
“Given the data and the information we have, we do not need to give people a third shot, a boost, superimposed upon the two doses you get with the mRNA (Pfizer/BioNTech and Moderna vaccine) and the one dose you get with (Johnson & Johnson),” he said.
The UK JCVI’s interim advice, based on existing evidence, is to offer COVID-19 booster vaccines to the most vulnerable, starting from September 2021. The booster programme will aim to provide additional resilience against variants, and maximise protection in those who are the most vulnerable to serious disease from COVID-19 ahead of the winter months, when there is increased pressure on the NHS as non-COVID-19 emergency demand is at its highest.
A booster dose would be offered to groups in 2 stages and, if possible, delivered alongside the annual influenza vaccination. In the first stage, a booster would be offered to:
- adults aged 16 years and over who are immunosuppressed
- those living in residential care homes for older adults
all adults aged 70 years or over
- adults aged 16 years and over who are considered clinically extremely vulnerable
- frontline health and social care workers
As soon as practicable after the first stage, the second stage would see a booster offered to:
- all adults aged 50 years and over
- adults aged 16 to 49 years who are in an influenza or COVID-19 at-risk group
- and adult household contacts of immunosuppressed individuals
Moscow Mayor Sergei Sobyanin has said that revaccination against coronavirus in the capital will take place with the Sputnik Light vaccine, which is also planned to be used to vaccinate labor migrants.
“It is vitally important to start revaccination now. Therefore, we will work with the government so that they quickly make a decision on the timing and technology. Revaccination will be the first component of the vaccine. If there was Sputnik, then the first component of Sputnik. There are no other options yet.” –
He said that the first component of Sputnik Light is planned to begin vaccination of labor migrants working in Moscow.
“Now the production of Sputnik Light has begun. In fact, this is the first component of the classic Sputnik . Most likely, we will receive permission to use it to vaccinate migrants,” Sobyanin wrote. He added that “according to our calculations, this will happen in early July, maybe even earlier.”
The Russian Ministry of Health clarified that Sputnik V and Sputnik Light are suitable for revaccination.