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The distribution of the vaccines to remote areas remains a challenge as countries begin administering them.
A healthcare worker in Thailand gets a booster dose of Pfizer's vaccine on August 9, 2021.
There are some slight differences between the second and third doses of the vaccine.
In September, the CDC gave the first comparison between the three vaccines that are available in the US: Pfizer, Moderna and Johnson & Johnson.
It's one of the most thorough looks at how people are responding to boosters.
The CDC found that people who received three doses of either Pfizer or Moderna had more local reactions than people who received two doses. The effects of fatigue, muscle aches, and headaches were less common after the third dose.
Only 10% of J&J booster recipients said their side effects prevented them from doing normal daily activities, while the rest said they were able to go about their day.
Pfizer or Moderna booster recipients said the shots hindered their daily routines. 12,000 people were included in the study, compared to 48 who received two J&J doses.
The table shows how the shots affected people who got three or more shots.
People who received a Pfizer or Moderna booster had the most fatigue.
The side effects of Moderna's third dose were more common than before.
Around 50% of Pfizer booster recipients reported fatigue, and less than 40% reported muscle aches and headaches.
Only one-quarter of those who received a J&J booster had injection site reactions, compared to 70% who got a Pfizer booster and 80% who got a Moderna booster. 20% of J&J booster recipients reported headaches.
The CDC allows you to mix and match boosters.
The CDC recommends booster shots for all Americans. People who received two doses of Pfizer's or Moderna's vaccine should get boosted at least six months after their second shot, according to the CDC, whereas J&J recipients can get boosted as early as two months after their first dose.
The CDC has approved a "mix and match" approach so people can choose a booster of a different vaccine type or different manufacturer than their original dose.
The October study funded by the US National Institutes of Health found that mix and match boosters had the same side effects as initial vaccine doses. More than half of the study's participants reported headaches, muscle pains, and arm pain after their booster.
A UK study identified fatigue, headaches, and pain at the injection site as the most common side effects. The study looked at nearly 2,900 people who had received two Pfizer or AstraZeneca doses and one of seven different COVID-19 boosters. The study found that the side effects from boosters were more common in people ages 30 to 69 than in people 70 and up.
After the first and second doses, fatigue, headaches, and muscles aches were common.
The body is instructed to make a harmless viralProtein, then develop a resistance against it. Our bodies are being introduced to the instructions and the resulting vaccine for the first time, so the mildest side effects are produced by the first dose.
By the time we receive a second and third dose, our bodies have learned how to recognize the same thing, so they are ready to attack it. Side effects are more pronounced because of that. If you've had COVID-19 before, your first dose may be more intense than your second or third, according to one preprint.
The chart shows vaccine side effects based on your age group, vaccine manufacturer and dose you received. The data is from the trial.
After the first and second doses, fatigue, headaches, and muscles aches were common.
Older people experience less side effects than younger people because their immune responses weaken with age. Older people are in particular need of boosters because the Omicron variant increases the risk of re-infection compared to other coronaviruses.
Early lab studies suggest that it's better than the original virus at evading the vaccine's antibodies.
Business Insider has an original article.
The Pfizer vaccine's reported effectiveness against the Omicron variant has been found in 33 US states and 77 countries worldwide.
A study released on Tuesday shows that the three U.S.-authorized COVID-19 vaccines appear to be less protective against the Omicron variant of the coronaviruses in laboratory testing, but a booster dose likely restores most of the protection. People who received Moderna, Johnson & Johnson and Pfizer/BioNTech vaccines were tested for pseudoviruses in a study by researchers at Massachusetts General Hospital, Harvard and MIT. Two shots of the Moderna or Pfizer/BioNTech vaccines or one of J&J's single-dose vaccine were found to neutralize the variant from the regular regimen of all three vaccines.
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Federal officials think Omicron infections could peak in January.
Some people may not experience side effects at all because their immune system is not the same as the other.
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Chris Whitty warned the Cabinet to expect a significant increase in hospitalisations because of omicron, as he said that claims that Covid-19 has peaked in South Africa were not reliable.
The data from South Africa shows that two shots of the vaccine alone won't stop an illness, but it will help.
As more data continues to be collected, the province is preparing for the worst, as the doctor said thathoping is not a strategy when it comes to the ongoing and future impact of the Omicron COVID-19 variant.
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According to the CDC, as of December 5, only over five million of the 28 million children in the US have received at least one dose of the vaccine.
German researchers found that Eli Lilly and Regeneron's COVID-19 therapies lose most of their effectiveness when exposed to the Omicron variant of coronaviruses in a laboratory. Two groups of Germany based scientists found that protection from the cocktail Xevudy held up when exposed to Omicron in lab experiments, but that it was not the case for Lilly's antibodies. One of the groups, consisting of Cologne and Berlin-based scientists, said in their paper that the Omicron variant will limit treatment options for COVID-19.
Rochelle Walensky told the Today show that even if Omicron is less severe, people should still get vaccinations and boosted against COVID-19.
The British government will remove all 11 countries from its travel red list on Wednesday because of community transmission of Omicron in Britain, Health Secretary Sajid Javid said. The Omicron variant was first found in southern Africa. The British government added 11 African countries to its red list in late November and only UK citizens or residents were allowed in and then had to stay in a hotel.
The symptoms of Omicron may be different from other signs. Here's what the data suggests so far.
Parents have a lot of questions about booster shots. Will children be eligible in the future? Is it possible to mix and match booster shots? We talked to experts to learn more.
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Concerns about the omicron variant as well as some good news are helping drive these vaccine stocks higher.
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The World Health Organisation's Emergency Director Mike Ryan said on Tuesday that getting an initial course of vaccine to people who are not exposed should be the priority. A study on Tuesday found that two doses of Pfizer-BioNTech's COVID-19 vaccine appear to have given 70% protection against hospitalisation in South Africa in recent weeks, suggesting weaker efficacy against the new Omicron variant. Ryan said he expected the current vaccines would provide significant protection against hospitalisation and death, but that the data coming through was very preliminary and the WHO did not have enough of it yet to make a full determination. We should be giving booster doses to those in vulnerable groups if we can get those who are unvaccinated.
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