Number with COVID-19 in B.C. hospitals rises again as BCCDC tweaks wastewater reporting

The number of people in hospital with COVID-19 in B.C. rose again this week, reaching its highest level since mid-January.
There were 250 test-positive patients in hospitals across the province as of Thursday, still below the 255 that was the lowest total seen in 2022, but well above this year's low of 188.
The number of COVID-19 patients in B.C. hospitals on Thursdays in 2023 is shown. (CTV)
The number of COVID-19 patients in B.C. hospitals on Thursdays since the province switched to a "hospital census" model in January 2022 is shown. (CTV)
The hospitalization totals reported by the B.C. Centre for Disease Control every Thursday include both patients who are admitted because of serious cases of COVID-19 and those who are admitted to hospital for other reasons and test positive incidentally.
Health officials estimate that between 40 and 50 per cent of reported hospitalizations are caused by the coronavirus, while the rest are incidental.
Since the BCCDC began including incidental cases in its hospitalization total in January 2022, there have been as many as 985 people in hospital on Thursdays and as few as 188.
CASE DATA
Recent increases in hospitalizations have come alongside increases in other metrics monitored by the BCCDC each week.
On Thursday, the centre reported 405 new, lab-confirmed cases of COVID-19 during the most recent epidemiological week, which ended March 18.
That's an increase of about eight per cent from the 374 reported last week for the period that ended March 11. This week's total is also the highest the BCCDC has reported since Jan. 26, when it announced 408 new cases detected during the week that ended Jan. 21.
Official case counts only tell part of the story, however, as restrictive testing eligibility criteria means only a small fraction of B.C. residents qualify for the kind of test that is included in the BCCDC's weekly updates.
The results of at-home rapid tests are not collected or reported, and experts estimate that the official case count underestimates the number of actual infections in B.C. each week by roughly 100-fold.
WASTEWATER CHANGES
To complement the official case count, the BCCDC also monitors the concentration of SARS-CoV-2 in wastewater at treatment plants around the province.
For the last several weeks, wastewater data has shown increasing concentrations at all monitored plants in B.C.
While that trend has corresponded with rising trends in other metrics, it's difficult to say how significant the surge in wastewater concentrations has been, because the BCCDC recently changed its approach to testing.
"On Feb. 28, 2023, BCCDC began using a more sensitive test for SARS-CoV-2 in wastewater," reads a statement added to the wastewater reporting page on the BCCDC website last week.
"Increases in the viral signal after this date compared to before it may be due, in part, to this change. Please use caution when comparing data before and after Feb. 28, 2023."
CTVNews.ca Top Stories
BREAKING | Police dealing with barricaded person in Hamilton, Ont. involved in double homicide
Police in Hamilton, Ont. are dealing with a barricaded person who they say is involved in the deaths of two people.

Running through middle age can keep brain healthy and neurons wired: study
Exercising as you age can help maintain memory and fight cognitive decline, according to a new study.
Prediabetes: The younger you are, the higher the risk of dementia
People who develop prediabetes when they’re younger are likely to have a higher risk for dementia in later life, a new U.S. study has found.
Team Canada hockey players Marie-Philip Poulin and Laura Stacey engaged
Celebrated Team Canada hockey players Marie-Philip Poulin and Laura Stacey have announced their engagement.
Attorney for 11-year-old Mississippi boy shot by police says there's 'no way' he could have been mistaken for an adult
An attorney for an 11-year-old Mississippi boy who was shot by a police officer after he called 911 for help said Thursday there was 'no way' the boy could have been mistaken for an adult.
GOP-controlled Texas House impeaches Republican Attorney General Ken Paxton, triggering suspension
Texas' Republican-led House of Representatives impeached state Attorney General Ken Paxton on Saturday on articles including bribery and abuse of public trust, a sudden, historic rebuke of a GOP official who rose to be a star of the conservative legal movement despite years of scandal and alleged crimes.
Killer whales wreck boat in latest attack off Spain
Killer whales severely damaged a sailing boat off the coast of southern Spain, the local maritime rescue service said on Thursday, adding to dozens of orca attacks on vessels recorded so far this year on Spanish and Portuguese coasts.
Scientists identify polar cyclone swirling on mysterious Uranus
It is a world wrapped in mystery - the seventh planet from the sun, Uranus, seen up close just once nearly four decades ago by a passing NASA probe and still warily guarding its secrets.
Mexican authorities make arrest in mid-May killing of Quebec man at seaside town
Mexican authorities say they've made an arrest in the killing of a Quebec man earlier this month in the Pacific coast beach town of Puerto Escondido. The Oaxaca state attorney general says in a statement issued Friday that an arrest warrant was executed for a man in Puerto Escondido identified only by his initials in connection with the homicide of Victor Masson.