ABSTRACT
The COVID-19 pandemic has impacted in the lifestyle of people: it has changed habits, mobility and working dynamics, which has led to a rise in basic supply consumption in households. This paper aims to analyse the change in hot domestic water consumption during COVID-19 compared with pre-pandemic periods, in volume terms and the pattern change. For this purpose, an own-developed stochastic model to characterize domestic hot water use is modified to different restriction scenarios to adapt it to COVID-19 pandemic conditions. To validate the model, Urban Water consumption changes during 2020 in the cities of El Prat de Llobregat and Barberà del Vallès are analyzed in order to relate total use of water in residential homes and domestic hot water consumption. The mean increase for DHW found is around 7%. For good measure, daily water pattern consumption results increased from 10h to 13h and from 16h to 19h in this scenario, which is consistent with the literature review. Both results, volumetric and pattern, are considered valid. © 2022 by the authors. Licensee AEIPRO, Spain.
ABSTRACT
Objective: To compare humoral and cellular responses to COVID-19 vaccines in 400 consecutive MS patients who were on Ocrelizumab ('OCR') and other disease-modifying therapies ('nonOCR') at the time of vaccination. Background: Peripheral B-cell depletion with anti-CD20 therapies, attenuates humoral responses to vaccines, but less is known about cellular responses. Design/Methods: Consecutive MS patients from NYU MS Care Center were invited to participate if they completed COVID-19 vaccination ≥6 weeks previously. Immune testing included anti-spike RBD antibody (Elecsys Anti-SARS-CoV-2) (Roche Diagnostics);multiepitope bead-based immunoassays (MBI) of antibody-responses to SARS-COV-2 spike proteins (threshold of 'positivity'was chosen as 2 SD below non-OCR mean);T-cell responses to SARSCoV-2 Spike protein using IFNγ enzyme-linked immune-absorbent spot (Invitrogen) and TruCulture (Myriad RBM) assays;high dimensional immunophenotyping;live virus immunofluorescence-based microneutralization assay. Results: Antibody and T cell data was available on 145/355 patients enrolled to date (mean age: 40.0 years;75% female;48% non-white;39% on OCR;12% with prior COVID-19 infection;vaccines: 58% Pfizer/BioNTech, 36% Moderna and 6% Johnson&Johnson;median vaccine-tosample time: 93 (+/-32) days). In OCR, Elecsys Anti-SARS-CoV-2 Ab titers were detected in 30/63 (48%;mean antibody titer in log scale: 1.63) and in non-OCR - in 78/81 (96%, mean Ab titer in log scale: 2.83;p<0.0001). In OCR, antibody response by MBI were detected in 41/57 (72%, mean level in log scale: 3.09) and in non OCR - in 68/72 (94%, mean level in log scale: 4.08;p<0.001). Neutralizing antibodies were detected in 10/42 (38%) of OCR and 24/43 (56%) of non-OCR (p=0.1). T-cell activation based on induced IFNg secretion (TruCulture) was observed in 50/64 (78%) OCR and 43/81 (53%) non-OCR (p=0.002). Conclusions: Preliminary results suggest robust vaccine-specific T-cell immune response to SARS-CoV2 vaccines in B-cell depleted patients, but markedly attenuated antibody responses. Final results of pre-planned multivariable analyses stratified by DMT class and high-dimensional immunophenotyping will be presented.
ABSTRACT
Objective: To compare humoral and T-cell responses to COVID- 19 vaccines in 400 MS patients who were on Ocrelizumab ('OCR') v. other disease-modifying therapies ('non-OCR') at the time of vaccination. Introduction: Peripheral B-cell depletion with anti-CD20 therapies attenuates humoral responses to vaccines. Whether immune responses to COVID-19 vaccines differ between B-cell depleted and non-B cell depleted MS patients is not known. Methods: Consecutive MS patients from NYU MS Care Center were invited to participate if they completed COVID-19 vaccination ≥6 weeks previously. Immune testing included anti-spike RBD antibody (Elecsys Anti-SARS-CoV-2) (Roche Diagnostics);multiplex bead-based immunoassays of antibody-responses to SARS-COV-2 spike proteins;T-cell responses to SARS-CoV-2 Spike protein using IFNγ enzyme-linked immune-absorbent spot (Invitrogen) and TruCulture (Myriad RBM) assays;high dimensional immunophenotyping;and live virus immunofluorescencebased microneutralization assay. Results: As of 7/15/2021, 105 MS subjects were enrolled (mean age: 40.5 years;76% female;41% non-white;38% on OCR;12% with prior COVID-19 infection). 95% were fully vaccinated with mRNA vaccines (Pfizer/Moderna);5% - with adenovirus-based vaccine (Johnson&Johnson). Median time from sample collection to last vaccine was 79 days. Positive Elecsys Anti-SARS-CoV-2 Ab titers post-vaccine were detected in 11/37 (30%) in OCR (mean level: 702 U/mL among seropositives) and 54/54 (100%) patients in non-OCR (mean level: 2310 U/mL;p<0.0001). Positive response by multiplex assay (threshold of 'positive' defined as 2 SD below the mean for the non-OCR) were detected in 10/27 (37%) OCR and 29/31 (94%) non-OCR (p<0.00001). T-cell activation based on induced IFNγ secretion (TruCulture) was detected in 20/25 (80%) OCR and 16/19 (84%) non-OCR patients (p=0.71). Conclusions: Preliminary results suggest robust T-cell immune response to SARS-CoV2 vaccines in approximately 80% of both OCR and non-OCR MS patients. Antibody responses were markedly attenuated in OCR compared to non-OCR group. Updated results will be presented.