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Artículos sobre Vaccines

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Pharmacist Barbara Violo arranges all the empty vials of the AstraZeneca COVID-19 vaccine that she has provided to customers at an independent pharmacy in Toronto. THE CANADIAN PRESS/Nathan Denette

AstraZeneca second dose: Should I get the same vaccine or choose Pfizer or Moderna?

Hundreds of thousands of Canadians got a shot of AstraZeneca's COVID-19 vaccine for their first dose. They now have a choice for their second dose: AstraZeneca again, or Pfizer or Moderna mRNA vaccine?
A nurse treats a patient inside a COVID-19 ward of a government run hospital in Kathmandu, Nepal on May 12, 2021. (AP Photo/Niranjan Shrestha)

With COVID-19 cases surging, Nepal asks global community for urgent vaccine help

The COVID-19 cases are surging in Nepal, potentially surpassing India's reproduction rate, but the country is out of vaccines. Global aid could help with one of the worst health crises in South Asia.
This giant effigy of the SARS-CoV-2 coronavirus is intended to be burned as part of the Holika Dahan, during which the demon Holika is led to the stake on the eve of the Holi celebrations, a popular Hindu festival. Sujit Jaiswal/AFP

RNA vaccines: what protection do they provide against Covid-19 variants?

One of the main fears regarding new SARS-CoV-2 variants is that they might be resistant to immunity granted by vaccines, including RNA vaccines.
Vaccinated people are well protected from getting sick, but could they inadvertently transmit the coronavirus? Noam Galai/Getty Images Entertainment via Getty Images

Can people vaccinated against COVID-19 still spread the coronavirus?

The COVID-19 vaccines are a smash success. But that doesn't mean they keep every vaccinated person completely free of the coronavirus.
A health worker administers an injection to a child below the age of one year during a routine immunisation at a health center in Kampala, Uganda. Xinhua/Nicholas Kajoba via Getty Images

Low trust in authorities affects vaccine uptake: evidence from 22 African countries

Even where vaccines are available, one barrier to progress is vaccine hesitancy: the reluctance or refusal to vaccinate.
A lab worker extracts DNA from samples for further tests at the AIDS Vaccine Design and Development Laboratory Dec. 1, 2008 in New York City. Chris Hondros/Getty Images

HIV/AIDS vaccine: Why don’t we have one after 37 years, when we have several for COVID-19 after a few months?

Scientists developed vaccines for COVID-19 in a matter of months. Why after 37 years do we still not have one for HIV/AIDS? On HIV Vaccine Awareness Day, it's an important question to ask.
The maker of Bud Light says it will give all Americans over 21 a free beer if the U.S. reaches Biden’s 70% vaccination goal. Andrew Burton/Getty Images

Free beer, doughnuts and a $1 million lottery – how vaccine incentives and other behavioral tools are helping the US reach herd immunity

Governments and companies are using incentives in hopes of getting more Americans to get a COVID-19 shot. A behavioral economist explains how they work.
Children wearing masks sit behind screened-in cubicles in their classroom at a Toronto school during the COVID-19 pandemic. THE CANADIAN PRESS/Nathan Denette

3 reasons for making COVID-19 vaccination mandatory for children

Full population-level protection against COVID-19 will require most adolescents and children to be vaccinated. There are ethical arguments for encouraging vaccination uptake through vaccine mandates.
Vanquishing the enemy? People stand in a quick moving line up at a mass vaccination centre during the COVID-19 pandemic in Mississauga, Ont., on May 10, 2021. THE CANADIAN PRESS/Nathan Denette

Confusing AstraZeneca warfare messaging: Destroy the COVID-19 enemy fast, but wait

Public officials are telling us simultaneously to move swiftly on vaccination and also to make thoughtful, reasoned choices about which vaccine we get. These messages are confusing and frustrating.

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