ABSTRACT
Background. Tixagevimab/cilgavimab (TC) was approved by the FDA in December 2021 for use as pre-exposure prophylaxis in patients with moderate to severe immune compromise. On February 24, FDA recommended a second dose for patients who received the original dosing because of decreased activity against Omicron subvariants. We were interested in reviewing TC experience in Minnesota. Methods. Minnesota Department of Health established a voluntary TC patient registry in December 2021, including date of treatment, COVID-19 vaccination status and immunocompromising conditions. Patients were matched to state COVID-19 case data from December 1, 2021 to April 22, 2022, to examine occurrence of SARS-CoV-2 infection (a positive test by PCR or antigen) following receipt of TC. Results. Data were available for 289 patients, representing 5-10% of all patients treated with TC in Minnesota. 53% were male with a median age of 62 (IQR 48-70). 13 patients (4.5%) had not received COVID-19 vaccine at the time of initial TC dose. 128 patients (44%) received 2 doses of TC. Immunocompromising conditions included: hematological malignancy (114, 39.4%), treatment with immunosuppressant medications (113, 39.1%), solid organ transplant (45, 15.6%), and stem cell transplant (13, 4.5%). 5 patients (1.7%) had a positive SARS-CoV-2 test (4 PCR, 1 antigen) following receipt of TC (Table 1);patients tested positive on days 7, 11, 13, 17 and 48/70. Three patients were on rituximab and 2 had hematological malignancy. All 5 had received 3 doses of COVID-19 vaccine prior to receipt of TC. Variant information was available for 2 patients: BA.1 and BA.1.1. 1 patient required hospitalization for COVID-19 and died 39 days after the positive test but had 3 subsequent negative tests before discharge;death was attributed to underlying malignancy. Table 1: Characteristics of patients with positive SARS-CoV-2 tests following treatment with tixagevimab/cilgavimab. Conclusion. In a convenience sample of 289 patients who received TC, 5 patients had COVID-19, with 3 occurring within the SARS CoV-2 incubation period following receipt of TC. One of the other patients was positive after receiving 2 doses of TC. Following effectiveness of TC will be useful as SARS CoV-2 continues to evolve.
ABSTRACT
Background. Adults aged >=65 years and those with underlying medical conditions, including residents of long-term care facilities (LTCF), are at increased risk for COVID-19-associated hospitalizations and other severe outcomes. Methods. Hospitalizations among LTCF residents aged >= 65 years from March 2020-January 2022 were described using data on a representative sample of hospitalizations from the CDC's COVID-19-Associated Hospitalization Surveillance Network (COVID-NET), a population-based surveillance network of > 250 acute care hospitals in 99 counties across 14 states. A Poisson regression model adjusting for age, race/ethnicity, underlying medical conditions, vaccination status, month of admission, and do-not-resuscitate/intubate-or-provide comfort-measures-only (DNR/DNI/CMO) code status examined the relationship of LTCF residency to death during COVID-19-associated hospitalization. Results. Of 11,901 hospitalizations among adults aged >= 65 years reported during the study period, 2,965 (24.9%) were LTCF residents;most resided in nursing homes (53.8%) or assisted living facilities (26.8%). LTCF residents hospitalized with COVID-19 were older and more likely to have cardiovascular disease, congestive heart failure, a neurologic condition, dementia, or >= 3 underlying medical conditions than non-residents (Figure). The proportion of LTCF residents vs non-residents who required intensive care unit admission or invasive mechanical ventilation were not statistically different (23.2% vs 23.5% and 10.7 vs 13.5%, respectively). The proportion of in-hospital death was higher among LTCF residents than non-residents (22.8% vs 14.4%, p < 0.01). More LTCF residents have a DNR/DNI/CMO code status (48%) compared to non-residents (19%). The fully adjusted regression model found the risk ratio for death was 1.03 (95% CI, 1.01-1.05) among LTCF residents compared to non-residents. Conclusion. Compared to non-residents, LTCF residents were older, had more underly ingconditions, and had a higher risk of in-hospital death. After adjusting formultiple potential confounders, results suggest that LTCF residency is a weak but significant independent risk factor for death during COVID-19-associated hospitalization.
ABSTRACT
Background. Over 600,000 COVID-19 cases, including >7000 deaths reported to MN Dept of Health (MDH) by June 1, 2021. Clinical trials demonstrated high effectiveness of COVID vaccines. We assessed COVID-19 cases among fully vaccinated residents [vaccine breakthrough (VB) cases]. Methods. COVID-19 VB cases were MN residents with completed COVID-19 vaccination series ≥14 days prior to symptom onset or positive for SARS-CoV-2 by nucleic acid amplification or antigen test. COVID-19 cases were reported to MDH and COVID-19 vaccinations reported to the MN Immunization Information Connection (MIIC). COVID-19 cases were matched to MIIC to identify VB and interviewed;medical records of hospitalized cases were reviewed. Available VB case specimens underwent whole genome sequencing (WGS) at MDH or collaborating lab. Results. Jan 19 - June 1, 2021, 2765 VB cases were reported among >2.45 million fully vaccinated residents and 147,445 COVID-19 cases. VB case median (MED) age was 52 y (IQR 38, 68), 83% white, 65% female;MED age of fully vaccinated was 55 y (IQR 30, 68), 77% white, 54% female. Of VB cases, 273 (10%) were hospitalized and 32 (1%) died (MED age 74 y;IQR 66, 85). 2212 (80%) VB cases were interviewed;60% reported symptoms;most common were fatigue (53%), rhinorrhea (49%), cough (42%), headache (41%). 35% reported a comorbidity. Of hospitalized VB cases, 120 had completed record reviews. 64 were admitted for COVID-19 related illness (MED age 74 y, IQR:65, 83) including 27 admitted to ICU (MED age 71 y, IQR: 65, 83). 90% (108) reported a comorbidity, most common being chronic metabolic conditions (46%), obesity (45%), renal disease (31%) and chronic lung disease (26%);27 were immunocompromised (not mutually exclusive), including immunosuppressive therapy (15), hematological malignancy (9), other cancer (11), and organ transplant recipients (8). Of 604 VB case specimens, 79% were B.1.1.7, 9% B.1.427/429, 3% P.1, and 2% B.1.351;lineage distribution was similar to overall 24,157 MN SARS-CoV2 WGS data. Conclusion. Identified VB cases were 0.1% of those vaccinated and < 2% of total cases reported in the time period. COVID-19 vaccines are an important tool in preventing COVID-19. Additional surveillance, including WGS and case characteristics will be useful to monitor VB.
ABSTRACT
Background. Remdesivir (RDV) was approved by FDA in October 2020 for use in hospitalized patients with COVID-19. We examined the association between RDV treatment and ICU admission in patients hospitalized with COVID-19 pneumonia requiring supplemental oxygen (but not advanced respiratory support) in MN. Methods. COVID-19-Associated Hospitalization Surveillance Network (COVID-NET) is population-based surveillance of hospitalized laboratory confirmed cases of COVID-19. We analyzed COVID-NET cases ≥18 years hospitalized between Mar 23, 2020 and Jan 23, 2021 in MN for which medical record reviews were complete. On admission, included cases had evidence of COVID-19 pneumonia on chest imaging with oxygen saturation < 94% on room air or requiring supplemental oxygen. Cases were excluded if treated with RDV after ICU admission. Multivariable logistic regression was performed to assess the association between RDV treatment and ICU admission. Results. Complete records were available for 8,666 cases (36% of admissions statewide). 1,996 cases were included in the analysis, of which 908 were treated with RDV. 83% of cases were residents of the 7-county metro area of Minneapolis-St. Paul. Mean age was 59.7 years (IQR 48-72), 55% were male, and the mean RDV treatment duration was 4.8 days (range 2-15). The proportion of cardiovascular disease (30.6% vs 23.9%, p=.003), renal disease (16.6% vs 7.6%, p< .001), and diabetes (34.7% vs 29.5%, p=0.01) was higher in the RDV untreated group, while obesity (22.3% vs 8.4%, p< .001) and dexamethasone use (54.7% vs 15%, p< .001) was more common in the RDV treated group. RDV untreated patients were more likely to be admitted to an ICU (18% vs 8.9%, p< .001) and had higher inpatient mortality than those treated with RDV (11% vs 4.4%, p< .001). After adjustment for dexamethasone use, age, sex and diabetes, treatment with RDV was associated with 48% lower odds of ICU admission (OR 0.52, 0.39-0.7, p< .001). Conclusion. We found RDV treatment associated with a significantly lower risk of ICU admission in patients admitted to hospital requiring supplemental oxygen, suggesting that treatment may prevent disease progression in this group. Further studies should assess the potential benefit of RDV combination treatment with dexamethasone.