Canada's CPHO Profile picture
Jun 29, 2020 14 tweets 7 min read Read on X
1/14 #PublicHealth Contact Tracing 101 & YOU: Achieving and maintaining low levels of #COVID19 activity is crucial for minimizing illness and deaths, but it also preserves capacity for #TestandTrace to bring the epidemic under control.
2/14 If we think of #COVID19 cases as small fires (and contacts like dry grass waiting to ignite), local #PublicHealth are the firefighters and case isolation, contact tracing/quarantine is like dousing with water to control the blaze.
3/14 The more fires there are to put out, the greater the risk that #PublicHealth capacity and resources will be overwhelmed trying to get to all the fires before the wind shifts and starts an uncontrollable blaze.
4/14 When epidemic growth is increasing exponentially, as it did at the beginning of the #COVID19 epidemic in Canada, there were too many little fires that quickly merged into a big blaze, overwhelming #TestandTrace capacity.
5/14 This is why closure of social and economic spaces was required, much like a countrywide fire ban, to bring the #COVID19 epidemic under control and not overwhelm the health system.
6/14 Thanks to Canadians’ collective efforts in our biggest “bucket brigade” to date, the big fire is out and local #publichealth #COVID19 fighters can now do what they do best – case investigation and contact tracing to control smaller fires!
7/14 Case investigation involves local #publichealth identifying #COVID19 cases through lab testing and conducting exposure investigations to understand how/where cases were infected and who they may have spread the infection to.
8/14 Contact tracing comes next and involves, tracking down every person who may have been exposed to the case, either directly through close contact, or indirectly in a shared space like a home or workplace.
9/14 But the work doesn’t stop there. Cases who are identified need to be provided with education and support on how to self-isolate to ensure they do not expose others to the virus.
10/14 Similarly contacts, few or many, need information and support to quarantine and monitor for #COVID19 symptoms, while #PublicHealth follow up continues for weeks until cases and contacts no longer pose a risk for spread to others.
11/14 Ultimately, the success of case finding and contact tracing is in the speed and completeness with which it is done. The fewer the number of cases and contacts, the faster and more completely new fires can be extinguished.
12/14 That’s where Canadians come in. By keeping ↑ #PhysicalDistancing + #GoodHygiene and AVOIDING high risk exposure settings like closed spaces, crowded places and close contact situations, WE stop new fires from starting as we reopen.
13/14 Limiting the number of contacts that we each have is also important as it means less fuel for any fires that do start. This will allow #PublicHealth to rapidly complete contact tracing and keep #COVID19 under control. #TestandTrace
14/14 Canada needs all the volunteer #COVID19 firefighters we can get – help smother the embers by keeping #publichealth practices UP and your number of contacts DOWN – public health thanks you!! #TeamCanada

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More from @CPHO_Canada

Dec 15, 2022
1/4 Co-circulation of #COVID19, #influenza & #RSV viruses is causing significant strain on health care systems. Very young & elderly people and those with pre-existing medical conditions, continue to be at highest risk for serious illness.

canada.ca/en/public-heal…
2/4 Most worrisome is an increase in influenza-related hospitalisations. Also, sentinel paediatric hospital data suggest a shift to a ↑ proportion of hospitalized cases in 10-16 year-olds, compared to seasons prior to the #COVID19 pandemic.

canada.ca/en/public-heal…
3/4 However, the highest cumulative hospitalization rates for influenza continue to be among young children under 5 years of age and weekly pediatric hospitalization numbers remain above typical peak season levels.
Read 4 tweets
Dec 14, 2022
1/4 Today, as co-chairs of the Special Advisory Committee on the Epidemic of #OpioidOverdoses, Dr. Yves Léger and I are releasing the latest national data on the #OverdoseCrisis.
canada.ca/en/public-heal…
2/4 These latest data show the tragic and continued increase in average daily deaths and hospitalisations due to opioid-related overdoses in Canada in 2021, compared to earlier years. Image
3/4 From April to June 2022, a total of 1,652 people lost their lives, while 1,163 were hospitalized due to an opioid-related overdose. #StopOverdoses Image
Read 4 tweets
Sep 7, 2022
(1/5) Today, Canada’s Chief Medical Officers of Health are reinforcing the importance of staying up to date with vaccines to maintain protection against COVID-19 and other vaccine preventable diseases
canada.ca/en/public-heal…
(2/5) We are also celebrating the collaboration and efforts of jurisdictions, Indigenous partners, healthcare workers, individuals and communities. Our continued collective efforts will be integral to our emergence from this pandemic.
(3/5) With #COVID19Vaccines now available to anyone 6 months or older, staying up to date means getting a primary series and then #BoosterDoses when you are eligible, recognizing jurisdictions’ programs may differ based on epidemiology and programmatic considerations.
Read 5 tweets
Jul 6, 2022
1/5 Today, the COVID-19 Immunity Task Force (CITF) announced seroprevalence results from 21 studies funded by the Government of Canada, estimating the level of infection during the Omicron wave up to the end of May 2022. covid19immunitytaskforce.ca/the-omicron-ts…
2/5 Antibodies to certain blood proteins known as “nucleocapsids” only develop in those who’ve been infected. So detecting their presence in blood (seroprevalence) is a way to estimate the proportion of people with past #SARSCoV2 infection.
3/5 CITF results confirm the massive scale of the #Omicron wave. Before Omicron arrived in Dec 2021, ~7% of Canadians had infection-acquired antibodies to #SARSCoV2. Then from Dec 2021 to May 2022, that proportion rose to 45%!
Read 6 tweets
May 11, 2022
1/5 The Public Health Agency of Canada is aware that @SickKidsNews has reported cases of acute hepatitis of unknown origin in children to @ONTHealth. This is a relatively rare condition that does occur in Canada. In many cases, an underlying cause cannot be found.
2/5 Information on these and other cases is being further reviewed by health authorities. Those that meet the case definition will be reported to @GovCanHealth to be included in the national investigation.
3/5 We do not know if we are seeing an increase in the number of cases of acute hepatitis of unknown cause in children. More information is needed to assess the situation and any potential risks to people in Canada.
Read 5 tweets
May 9, 2022
1/5 #COVID19 key concerns 🇨🇦 : as public health measures have eased and we resume more activities and connections, other serious infectious diseases, such as influenza and measles, are making a comeback. canada.ca/en/public-heal…
2/5 #COVID19 is still circulating across the country and Canada is reporting increased #influenza activity in recent weeks, late in the 2021-22 season. This includes the first outbreaks and a sharp rise in influenza detections, mostly in ages <45 years.
canada.ca/en/public-heal…
3/5 .@UNICEF & @WHO report a 79% increase in worldwide measles cases in Jan-Feb 2022 compared to the same time last year, a worrying sign of overall heightened risk for spread of vaccine preventable diseases (VPD) that could trigger larger outbreaks.
who.int/news/item/27-0…
Read 5 tweets

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