Latest updates about Covid-19 vaccine
Latest updates about Covid-19 vaccine. Photo: Bao Nhan Dan

As vaccines to prevent COVID-19 roll out, get the latest news, updates, and the information you need about how the vaccines work, how they’re getting distributed and safety.

202 million vaccine doses all around the world

The biggest vaccination campaign in history is underway. More than 202 million doses have been administered across 88 countries, according to data collected by Bloomberg. The latest rate was roughly 6.35 million doses a day.

Latest updates about Covid-19 vaccine
Updated Feb 19, 2021. Photo: Bloomberg

In the U.S., more Americans have naow received at least one dose than have tested positive for the virus since the pandemic began. So far, 61.3 million doses have been given. In the last week, an average of 1.32 million doses per day were administered.

The first stage of the U.S. rollout fell short of federal projections as vaccinations proceeded unevenly across the states. After focusing first on hospitals and other institutional health-care settings, the next phase of vaccinations will draw more on pharmacies and health clinics—places where vaccines are more traditionally administered—and will broaden the pool of people eligible to get the shots. Some states are turning sport stadiums and theme parks into mass vaccination centers, Bloomberg reported.

Pfizer begin vaccine trials in pregnant women

Latest updates about Covid-19 vaccine
Photo: BBC

Yesterday, Pfizer and BioNTech announced that they have begun vaccine trials in pregnant participants aged 18 years and older. They write, “We are proud to start this study in pregnant women and continue to gather the evidence on safety and efficacy to potentially support the use of the vaccine by important subpopulations.”

In total, they plan to enroll 4,000 healthy pregnant participants during 24–34 weeks of gestation.

According to the press release, “The study will evaluate the safety, tolerability, and immunogenicity of two doses of [the Pfizer-BioNTech vaccine] or placebo administered 21 days apart.”

The press release outlines the importance of this research: “Pregnant women have an increased risk of complications and developing severe COVID-19, which is why it is critical that we develop a vaccine that is safe and effective for this population. We are deeply thankful to the volunteers who are enrolling in the trial and site investigators who are leading this work.”, Medicalnewstoday reported.

Vaccines and clinical trials

Vaccines typically require years of research and testing before reaching the clinic, but in 2020, scientists embarked on a race to produce safe and effective coronavirus vaccines in record time. Researchers are currently testing 70 vaccines in clinical trials on humans, and 20 have reached the final stages of testing. At least 89 preclinical vaccines are under active investigation in animals, Nytimes noted.

Latest updates about Covid-19 vaccine
Photo: Bao Quan Doi Nhan Dan
Phase one: Checks the safety of a vaccine and determines whether it triggers an immune response in a small group of healthy humans.

Phase two: Widens the testing pool to include groups of people who may have the disease or be more likely to catch it, to gauge the vaccine’s effectiveness.

Phase three: Expands the pool up to the thousands to make sure the vaccine is safe and effective among a wider array of people, given that immune response can vary by age, ethnicity, or by underlying health conditions.

The COVID-19 candidates, like all vaccines, essentially aim to instruct the immune system to mount a defense, which is sometimes stronger than what would be provided through natural infection and comes with fewer health consequences.

Vaccines typically require years of research and testing before reaching the clinic, but in 2020, scientists embarked on a race to produce safe and effective coronavirus vaccines in record time. Researchers are currently testing 70 vaccines in clinical trials on humans, and 20 have reached the final stages of testing. At least 89 preclinical vaccines are under active investigation in animals, Nationalgeographic noted.

A Third of COVID Survivors Have Long-Haul Symptoms

Latest updates about Covid-19 vaccine
Photo: HRW

Many patients with mild to moderate COVID-19 could become "long haulers," suffering symptoms months after they clear their non-life-threatening infection, new research shows.

About 33% of COVID-19 patients who were never sick enough to require hospitalization continue to complain months later of symptoms like fatigue, loss of smell or taste and "brain fog," University of Washington (UW) researchers found.

"We were surprised to have one-third of people with mild illness still experiencing symptoms," said lead researcher Jennifer Logue. She's a research scientist with the UW department of medicine's division of allergy and infectious diseases, in Seattle. "If you contract coronavirus, there's a good chance you could experience a lingering effect.", Webmd expressed.

* Click the links below to update information about Covid:

Guidelines on quarantine after COVID-19 vaccination: Protections, Recommendations Guidelines on quarantine after COVID-19 vaccination: Protections, Recommendations

Some fully vaccinated people can avoid a two-week quarantine after possible exposure to COVID-19, says CDC.

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