Latest Corvallis TRACE Effort Finds COVID Prevalence At Early Pandemic Levels

Jun 23, 2021


During Oregon State University’s seventh round of COVID-19 sampling throughout Corvallis—TRACE volunteers found evidence of the virus at similar levels seen at the start of the pandemic. 



TRACE team members started training for the COVID sampling project in April, 2020 in Corvallis.
Credit Karl Maasdam.

Even with a strong majority of the Corvallis community vaccinated, SARS-CoV-2 is still in the community, TRACE researchers said. 

 On June 5 and 6, 500 nasal swabs were gathered at 345 households. Results suggest three people per 1,000 in the community carried the virus on those days.


TRACE Field workers invite members of Corvallis households to participate in the COVID-19 sampling effort. 500 swabs were gathered at doorsteps on June 5 and 6, 2021.
Credit Karl Maasdam

The groundbreaking TRACE-COVID-19 public health project kicked off in April 2020 when the prevalence estimate was two cases per 1,000. The highest was in March of this year-with a 13-per-1,000 estimate. 


In this latest round, participants were invited to provide saliva samples for antibody testing. Those results are still pending. 

Teams from Samaritan Health Services were also on hand to offer vaccinations. They administered five doses at doorsteps. 


“There were only 21 TRACE participants over the age of 12 who had not already received at least one dose prior to our survey,” said TRACE project leader Ben Dalziel, an assistant professor in the OSU College of Science. “Among the 16 who did not request a vaccine, some may have had factors that precluded them from getting one. If someone declined, we didn’t ask why.”


Dalziel added, “We keep saying, everyone needs to remain vigilant and practice many of the same safety measures we’ve been urging for more than a year. SARS-CoV-2 is still with us.”