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WastewaterSCAN
@wastewaterscan.bsky.social
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WastewaterSCAN monitors infectious diseases through municipal wastewater systems across the U.S. to inform local & national public health responses. https://www.wastewaterscan.org/en
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Meet the Pathogen: #Influenza

Influenza is the respiratory virus that loves to crash your holiday plans. Most active in the fall and winter, Influenza brings symptoms like fever, cough, sore throat, headache, and joint pain.

Learn more. wastewaterscan.org/en/pathogens#Influenza
#MeetThePathogens
November 26, 2025 at 3:09 PM
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9/ Rare pathogens overview: Candida auris and Hepatitis A had at least one detection in the 380 samples collected in the past 10 days. Measles, West Nile Virus, and Mpox Clade Ib and II did not.
Dials summarizing detections for all monitored rare pathogens. There were no detections for measles, Mpox clade Ib, Mpox clade II, and West Nile Virus, and a low number of detections for Candida auris and hepatitis A.
November 25, 2025 at 10:31 PM
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8/ Norovirus: Norovirus is in the high category, with medium concentrations and an upward trend over the last 3 weeks.
A line graph showing norovirus concentrations in wastewater over the past year nationally and for four regions. Concentrations are increasing especially in the south.
November 25, 2025 at 10:31 PM
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7/ Other seasonal respiratory pathogens: Nationally, Flu B and HMPV are not in season, and currently are not detected frequently.
Line graphs showing concentrations of two other seasonal respiratory pathogens (Influenza B and HMPV) over the past year nationally and for four regions. Both currently have concentrations near 0.
November 25, 2025 at 10:31 PM
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6/ EV-D68: EV-D68 is in the ‘Low’ category nationally and is not in season. Detections are increasing in the West.
A line graph showing aggregated concentrations of EV-D68 nationally and in each census region. While EV-D68 levels are low nationwide, they have recently increased in all regions. They had increased drastically in the Midwest in October and decreased, while the West is slowly increasing.
November 25, 2025 at 10:31 PM
wastewaterscan.bsky.social
5/ Influenza A: Nationally, Flu A is not in season. It is being detected more frequently, and 16% of plants are in onset.
A line graph showing aggregated concentrations of Influenza A nationally and in each census region. Levels recently rose above 0.
November 25, 2025 at 10:31 PM
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4/ RSV: Nationally, RSV is not in season (no “onset” of an event in wastewater). It is being detected more frequently, and 6% of plants are in onset.
A line graph showing aggregated concentrations of RSV nationally and in each census region. Levels are currently low, but are increasing in the South.
November 25, 2025 at 10:31 PM
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3/ COVID-19 Variants: In sequencing data from a subset of WWSCAN sites from the week of Nov 15, 2025, we are seeing the XFG variant in orange make up approximately 87% of variants. Note sequencing data has a longer lag of 1-2 weeks after collection.
A bar graph showing the proportions of SARS-CoV-2 variants measured in wastewater over time. The XFG variant has been the most predominant variant for the past couple months.
November 25, 2025 at 10:31 PM
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2/ COVID-19: Nationwide, SARS-CoV-2 is in the ‘Medium’ category, with medium concentrations and a downward trend over the last 3 weeks.
Line graph showing concentrations of SARS-CoV-2 in wastewater nationally and for four regions (Northeast, South, Midwest, and West) over the past year. Concentrations have increased slightly over the past month.
November 25, 2025 at 10:31 PM
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1/ 📈 WWSCAN Weekly Data

Respiratory weekly update: SARS-CoV-2 is in the medium category, and all other respiratory viruses we monitor (RSV, Influenza A, Influenza B, HMPV and EV-D68) are in the ‘Low’ category nationwide.
Dials showing that SARS-CoV-2 is in the medium category, and all seasonal pathogens (Influenza A, Influenza B, RSV, HMPV, and EV-D68) are in the low category and not in seasonal onset.
November 25, 2025 at 10:31 PM
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Say hello to the pathogens WastewaterSCAN monitors across the country. They represent more than a dozen infectious diseases we can detect in #wastewater. From influenza to measles to parvovirus, we’ll be shining a spotlight on each pathogen’s unique characteristics over the next few months.
November 25, 2025 at 1:46 PM
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Before you host or travel to see family and friends next week for Thanksgiving, make sure you check respiratory virus levels near you to stay informed. Visit data.wastewaterscan.org for more information. 📊😷
November 21, 2025 at 7:48 PM
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📊 WWSCAN Weekly Data:

Rare pathogens overview: All rare pathogens, other than Mpox clade Ib and West Nile Virus, had at least one detection in the 404 samples collected in the past 10 days. 🛟😷🧪
Rare pathogens overview: Dials summarizing detections for all monitored rare pathogens. There were no detections for Mpox clade Ib and West Nile Virus, and a low number of detections for Candida auris, hepatitis A, measles and Mpox clade II.
November 20, 2025 at 8:51 PM
wastewaterscan.bsky.social
📊 WWSCAN Weekly Data:

Norovirus: Norovirus has medium concentrations in most regions except the West, and concentrations are especially increasing in the South.🛟😷🧪
Norovirus: A line graph showing norovirus concentrations in wastewater over the past year nationally and for four regions. Concentrations are increasing, especially in the south.
November 20, 2025 at 8:51 PM
wastewaterscan.bsky.social
📊 WWSCAN Weekly Data:

EV-D68: EV-D68 is in the ‘Low’ category nationally and is not in season. Detections have increased nationwide, primarily in a subset of plants in the West.🛟😷🧪
EV-D68: A line graph showing aggregated concentrations of EV-D68 nationally and in each census region. While EV-D68 levels are low nationwide, they have recently increased in all regions. They had increased drastically in the Midwest in October and decreased, while the West is slowly increasing.
November 20, 2025 at 8:51 PM
wastewaterscan.bsky.social
📊 WWSCAN Weekly Data:

Seasonal respiratory pathogens: Nationally, Flu A, Flu B, RSV, and HMPV are not in season (no “onset” of an event in wastewater). About 9%, 0%, 4%, and 0% of plants are still in onset, respectively. Concentrations of RSV are just beginning to increase in the South. 🛟😷🧪
Seasonal respiratory pathogens: Line graphs showing concentrations of the four main seasonal respiratory pathogens (Influenza A, Influenza B, RSV, and HMPV) over the past year nationally and for four regions. Most currently have concentrations near 0. The lines for Flu A and RSV have recently risen above 0, especially in the South.
November 20, 2025 at 8:51 PM
wastewaterscan.bsky.social
📊 WWSCAN Weekly Data:

COVID-19 Variants: In sequencing data from a subset of WWSCAN sites from the week of Nov 8, 2025, we are seeing the XFG variant in orange make up approximately 100% of variants. Note sequencing data has a longer lag of 1-2 weeks after collection.🛟😷🧪
COVID-19 Variants: A bar graph showing the proportions of SARS-CoV-2 variants measured in wastewater over time. The XFG variant has been the most predominant variant for the past couple months.
November 20, 2025 at 8:38 PM
wastewaterscan.bsky.social
📊 WWSCAN Weekly Data:

COVID-19: Nationwide, SARS-CoV-2 is in the ‘Medium’ category, with medium concentrations and no significant trend over the last 3 weeks.🛟😷🧪
COVID-19 Line Graph: Line graph showing concentrations of SARS-CoV-2 in wastewater nationally and for four regions (Northeast, South, Midwest, and West) over the past year. Concentrations have increased slightly over the past month.
November 20, 2025 at 8:38 PM
wastewaterscan.bsky.social
📊 WWSCAN Weekly Data:

Respiratory weekly update: SARS-CoV-2 is in the medium category, and all other respiratory viruses we monitor (RSV, Influenza A, Influenza B, HMPV and EV-D68) are in the ‘Low’ category nationwide.🛟😷🧪
Respiratory weekly update: Dials showing that SARS-CoV-2 is in the medium category, and all seasonal pathogens (Influenza A, Influenza B, RSV, HMPV, and EV-D68) are in the low category and not in seasonal onset.
November 20, 2025 at 8:38 PM
wastewaterscan.bsky.social
📊 WWSCAN Weekly Data:

Rare pathogens overview: All rare pathogens, other than Mpox clade Ib, measles, and West Nile Virus, had at least one detection in the 408 samples collected in the past 10 days. 🛟😷🧪
Rare pathogens overview: Dials summarizing detections for all monitored rare pathogens. There were no detections for Mpox clade Ib, measles and West Nile Virus, and a low number of detections for Candida auris, hepatitis A, and Mpox clade II.
November 15, 2025 at 3:59 PM
wastewaterscan.bsky.social
📊 WWSCAN Weekly Data:

Norovirus: Norovirus has medium concentrations in most regions except the West, and concentrations are especially increasing in the South.🛟😷🧪
Norovirus: A line graph showing norovirus concentrations in wastewater over the past year nationally and for four regions. Concentrations are increasing in the south.
November 15, 2025 at 3:59 PM
wastewaterscan.bsky.social
📊 WWSCAN Weekly Data:

EV-D68: EV-D68 is in the ‘Low’ category nationally and is not in season. Detections have increased nationwide, primarily in a subset of plants in the West.🛟😷🧪
EV-D68: A line graph showing aggregated concentrations of EV-D68 nationally and in each census region. While EV-D68 levels are low nationwide, they have recently increased in all regions. They had increased drastically in the Midwest in October and decreased, while the West is slowly increasing.
November 15, 2025 at 3:59 PM
wastewaterscan.bsky.social
📊 WWSCAN Weekly Data:

Seasonal respiratory pathogens: Nationally, Flu A, Flu B, RSV, and HMPV are not in season (no “onset” of an event in wastewater). About 6%, 0%, 4%, and 0% of plants are still in onset, respectively. Concentrations of RSV are just beginning to increase in the South. 🛟😷🧪
Seasonal respiratory pathogens: Line graphs showing concentrations of the four main seasonal respiratory pathogens (Influenza A, Influenza B, RSV, and HMPV) over the past year nationally and for four regions. Most currently have concentrations near 0. The lines for Flu A and RSV have recently risen above 0, especially in the South.
November 15, 2025 at 3:59 PM
wastewaterscan.bsky.social
📊 WWSCAN Weekly Data:

COVID-19 Variants: In sequencing data from a subset of WWSCAN sites from the week of Nov 8, 2025, we are seeing the XFG variant in orange make up approximately 100% of variants. Note sequencing data has a longer lag of 1-2 weeks after collection.🛟😷🧪
COVID-19 Variants: A bar graph showing the proportions of SARS-CoV-2 variants measured in wastewater over time. The XFG variant has been the most predominant variant for the past couple months.
November 15, 2025 at 3:59 PM
wastewaterscan.bsky.social
📊 WWSCAN Weekly Data:

COVID-19: Nationwide, SARS-CoV-2 is in the ‘High’ category, with medium concentrations and an upward trend over the last 3 weeks.🛟😷🧪
COVID-19 Line Graph: Line graph showing concentrations of SARS-CoV-2 in wastewater nationally and for four regions (Northeast, South, Midwest, and West) over the past year. Concentrations decreased since early September.
November 15, 2025 at 3:59 PM