The U.S. Centers for Disease Control and Prevention (CDC) has provided data showing that people who are not vaccinated are four-and-a-half times more likely to develop COVID-19 and 11 times more likely to to die as those who have been fully vaccinated.
Rochelle Walensky, director of the CDC, said during a COVID-19 briefing in the White House on Friday that the data showed that “vaccination works and will protect us from the serious complications of COVID-19”.
The studies involved more than 600,000 cases of COVID-19, hospitalizations and deaths in 13 states and major cities from April to mid-July.
‘If we look at cases in the last two months where the Delta variant was the predominant variant in this country, those who were not vaccinated were about four and a half times more likely to get COVID-19, more than 10 times more likely to be hospitalized and 11 times more likely to die from the disease, ”Walensky said.
While protection remained strong against Delta, the study also confirmed an increase in milder COVID-19 infections among fully vaccinated, which according to the authors ‘possible decrease in the immunity of the population caused by vaccine’.
Two other U.S. studies have also found that COVID-19 vaccines provide strong protection against hospitalization and death, even in light of the highly transmissible Delta variant, but vaccine protection appears to be declining among older people, especially under 75 and older.
U.S. data on hospitalization from nine states during the period when the Delta variant was dominant also suggest that the Modern vaccine was more effective in preventing hospitalizations among individuals of all ages than vaccines from Pfizer or Johnson & Johnson.
In the study of more than 32,000 visits to emergency care centers, emergency rooms and hospitals, Moderna’s vaccine was 95 percent effective in preventing hospitalization, compared with 80 percent for Pfizer and 60 percent for J&J.
Another study specifically looked at the performance of mRNA vaccines – such as the Pfizer and Moderna recordings – in patients at five Veterans Affairs medical centers, a racially diverse group made up largely of older male patients with a higher number of underlying diseases.
Of the more than 1,000 COVID-19 hospitalizations in the study, researchers found that both vaccines together were 86.8 percent effective against hospitalization — even against the Delta variant. But vaccine effectiveness has dropped to 79.8 percent among veterans 65 and older.
In the third study, which looked at medical appointments in nine states, the overall effectiveness of vaccines remains high at 86 percent against hospitalization and 82 percent against visits to the emergency room or an emergency care center. However, the efficacy of vaccines against hospitalization was ‘significantly lower’ among adults aged 75 years and older, which dropped to 76 per cent – the first time a decline was observed in this data set.
The data comes a day after US President Joe Biden unveils a six-step plan to combat the pandemic, which includes measures such as requiring some employers to impose vaccination mandates or mandatory tests, make more home-free tests available at home, and expand the government’s free testing program.
“I do not know of a scientist in this field who does not think it makes sense to do the six things I have suggested,” Biden said Friday during a visit to a local school in Washington, DC.
‘We need to get together. And I think the vast majority – look at the poll data – the vast majority of Americans know we need to do these things. They are difficult but necessary. We are going to get it right, ”he said.
According to CDC figures, approximately 177.4 million Americans, or 53.4 percent of the total U.S. population, has so far been fully vaccinated.
On average, more than 136,000 new cases are detected every day, according to the CDC, in a sharp increase from earlier summer when infections nationwide dropped significantly. More than 1,000 people die from the disease every day.