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Vaccines alone won't be enough to lift pandemic measures quickly, doctor warns

Shiloh

Shiloh

Editor, Senior Moderator
Source: https://www.cbc.ca/radio/thehouse/vaccine-immunity-task-force-1.5838293

Vaccines alone won't be enough to lift pandemic measures quickly, doctor warns
Dr. Catherine Hankins says there are still too many unanswered questions about how COVID-19 immunity works
Chris Hall ? CBC News ? Posted: Dec 12, 2020 4:00 AM ET | Last Updated: December 12

The co-chair of the federal task force studying COVID-19 immunity is warning that the arrival of vaccines in Canada doesn't guarantee protection against the virus, or signal that peoples' lives will soon return to normal.

Dr. Catherine Hankins told CBC's The House that there are still too many unknowns about COVID-19 immunity and the effectiveness of vaccines to quickly move beyond the pandemic measures now in place, such as mask mandates and limits on social and business activities.

"We still have a lot of questions about immunity, even from natural infection with the wild virus. How long does protection last? Is it boosted when you get exposed again? What will be the impact if you get a vaccine and you've had a previous COVID-19 infection?" Hankins said in an interview airing Saturday.

"But we're working really hard now on looking at how we can differentiate the natural immunity from the vaccine-induced immunity."...
 
Vaccine effectiveness against transmission of SARS-CoV-2 Data are limited to assess the effect of the vaccine against transmission of SARS-CoV-2 from individuals who are infected despite vaccination.

Demonstrated high efficacy against symptomatic COVID-19 may translate to overall prevention of transmission in populations with high enough vaccine uptake, though it is possible that if efficacy against asymptomatic infection were lower than efficacy against symptomatic infection, asymptomatic cases in combination with reduced mask-wearing and social distancing could result in significant continued transmission.

Additional evaluations including data from clinical trials and from vaccine use post-authorization will be needed to assess the effect of the vaccine in preventing virus shedding and transmission, in particular in individuals with asymptomatic infection.

https://www.fda.gov/media/144245/dow...qoKrub1xAGGEM4
 
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