Clinical studies show that mixing and matching booster vaccines can lead to a more robust immune response.
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On the horizon: A new omicron-focused version of the Moderna vaccine that may offer longer protection and a stronger immune response.
Millions of U.S. children between the ages of 6 months and 4 years will soon be eligible for COVID-19 shots.
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The FDA’s authorization of COVID-19 shots for children ages 6 months to 4 years will bring relief for millions of parents. Pending CDC endorsement, shots for this group will be available within days.
Inhaled vaccine delivery could take on not only COVID-19, but also other respiratory infections, including tuberculosis.
An inhaled COVID-19 vaccine would go directly to where the body would use it: the mucosal surface of the airways. This could mean less waste and more benefit, lower costs and reduced side-effects.
What’s the difference between a variant and a subvariant? It’s all in the behaviour.
It’s hard to keep up. But new Omicron sub-variants are emerging that may lead to reinfections and another spike in cases.
Ontario Chief Medical Officer of Health Kieran Moore arrives to speak at a press conference at Queen’s Park on April 11, 2022. Ontario lifted most COVID-19 restrictions in March.
THE CANADIAN PRESS/Nathan Denette
Instead of minimizing current or future waves of COVID-19, we need strategies to deal with new variants efficiently. Only then can we live with the virus in a healthy way.
More than 1,000 cases of omicron XE have been detected in the UK so far. But we shouldn’t be seriously concerned at this stage.
Our best chance of limiting the emergence of new recombinant COVID variants is to limit the spread of infections, using public health measures to slow and suppress the virus.
BA.2, one of three main omicron sublineages, is sweeping the world.
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The latest addition to the omicron lineage has been making waves in Europe. Whether it will do the same in the U.S. depends on rates of vaccination and prior infection.
Hybrid viruses that are part delta and part omicron have been found in Europe and North America.
COVID cases are predicted to rise as we face another variant. So a 4th shot to top up our immunity is looking more likely as we head into winter.
White-tailed deer are one of the few wild species that scientists have found to be infected with the coronavirus – at least so far.
Scientists have been testing captive and wild animals for the coronavirus since the pandemic began. Only a few wild species are known to carry the virus, but many more have been shown to be susceptible.
New variants of SARS-CoV-2, the virus that causes COVID-19, arise through mutations when the virus replicates in an infected host’s cells.
(NIAID, cropped from original)
COVID-19 variants are the products of the evolution of the SARS-CoV-2 virus. They arise via mutations, but other forces also have roles to play in the generation and transmission of variants.
A shipment of Covid vaccines sent to Sudan by the COVAX vaccine-sharing initiative, are unloaded in the capital Khartoum, October 6, 2021.
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From vaccines to treatments and even medical equipment, intellectual property rights have hampered the world’s efforts to fight the pandemic.
Vaccines are less effective at reducing the risk of viral mutation than they used to be – but they still make a difference.
After South African scientists sounded the alarm about the new omicron variant, countries around the world closed their borders.
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Variant-specific vaccines would undoubtedly increase immunity. But waves of new variants would engulf the population faster than these vaccines could ever be deployed.
Prime Minister Justin Trudeau gives a thumbs up signal after receiving his COVID-19 vaccine booster shot at a pharmacy in Ottawa on Jan. 4, 2022.
THE CANADIAN PRESS/Sean Kilpatrick
Canada’s strategy must include global engagement. Without it, we will be living on borrowed time, waiting for a new variant, a new booster, a new quick fix.
The best way to stop new variants from arising is to increase the proportion of vaccinated individuals while maintaining infection prevention measures like wearing masks and social distancing.
Even with a variant like Omicron that may be more transmissible than earlier variants, vaccines remain the most effective tool for protection against COVID-19 and for ending the pandemic.
A positive COVID-19 test is the first step in the process.
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A nationwide genomic surveillance system analyzes positive COVID-19 tests to build a picture of which variants are spreading in the population.