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Infectious Disease
Observational Report Notes Increase in At-Home COVID-19 Test Use During Omicron Period
Report shows increased use of at-home COVID-19 tests during Omicron period
An observational report of the U.S. population noted an increase in the use of at-home rapid COVID-19 antigen tests between the Delta and Om…
Use of at-home COVID-19 tests rose between the Delta and Omicron periods from August 2021 to March 2022.
CDC
Apr 5, 2026
Infectious Disease
Case series identifies 10 persons with Omicron variant infection within 90 days of Delta infection
Small report finds 10 people got Omicron variant soon after Delta infection
A descriptive case series identified 10 persons across four states who were infected with the SARS-CoV-2 Omicron variant within 90 days of a…
Ten people in four states caught the Omicron variant within 90 days of a recent Delta infection, confirming this sequence can happen.
CDC
Apr 5, 2026
Infectious Disease
US COVID-19 death rate disparities decreased among most racial/ethnic groups from 2020 to 2021
Did COVID-19 death disparities shrink in the US from 2020 to 2021?
An observational report of the US population found that disparities in COVID-19 death rates decreased among most racial and ethnic groups fr…
COVID-19 death disparities among most racial and ethnic groups in the US decreased from 2020 to 2021, according to a new report.
CDC
Apr 5, 2026
Infectious Disease
Voluntary reporting of COVID-19 self-testing data described in US setting
What can we learn from people who report their at-home COVID test results?
A report describes a system for voluntary reporting of COVID-19 self-testing data in the United States.
A new voluntary system lets people share at-home COVID test results to help track the virus, though officials caution the early data might b…
CDC
Apr 5, 2026
Infectious Disease
Surveillance report describes COVID-19 hospitalizations in adults during Omicron BA.2 predominance
Surveillance report describes COVID-19 hospitalizations during Omicron BA.2 wave
An observational surveillance report from 14 states described COVID-19-associated hospitalizations among adults during a period of Omicron B…
A recent report tracks COVID-19 hospitalizations among adults during the Omicron BA.2 wave across 14 states, offering a snapshot of public h…
CDC
Apr 5, 2026
Infectious Disease
CDC review examines SARS-CoV-2 rebound in COVID-19 patients with and without antiviral treatment
CDC reviews studies on COVID-19 rebound after antiviral treatment
A CDC review examined studies of SARS-CoV-2 rebound in COVID-19 patients who did and did not receive antiviral treatment.
The CDC reviewed studies on COVID-19 rebound after antiviral treatment, finding no new safety concerns but noting scientists are still learn…
CDC
Apr 5, 2026
Infectious Disease
In-hospital mortality risk assessed for US patients hospitalized primarily for COVID-19
What happens to people hospitalized for COVID-19 in the US?
An observational report examined in-hospital mortality risk among patients hospitalized primarily for COVID-19 in the United States.
A new report examines the risk of dying in the hospital for patients whose main reason for admission was COVID-19, but it has not yet shared…
CDC
Apr 5, 2026
Infectious Disease
Reported Racial Discrimination in Healthcare Linked to Higher COVID-19 Unvaccinated Prevalence
Adults reporting health care discrimination more likely to be unvaccinated against COVID-19
An observational study of U.S. adults found that reported experiences of racial and ethnic discrimination in healthcare were associated with…
Adults who reported facing racial or ethnic discrimination in health care were more likely to be unvaccinated against COVID-19.
CDC
Apr 5, 2026
Infectious Disease
Observational report examines COVID-19 antiviral treatment patterns in US older adults
Study examines COVID-19 antiviral treatment rates in older adults across age groups
An observational report from a US national research network examined COVID-19 antiviral treatment patterns among adults aged 65 years and ol…
A new report tracks how often older adults with COVID-19 receive recommended antiviral treatments, but full results are not yet shared.
CDC
Apr 5, 2026
Infectious Disease
RCT
Favipiravir PEP shows non-significant reduction in SARS-CoV-2 infection among household contacts in Thailand trial
Can a pill protect you after a family member gets COVID?
A phase 2/3 cluster-randomized trial in 168 Thai household contacts of COVID-19 cases compared favipiravir PEP (1600-2000 mg/day for 7 days)…
Taking an antiviral pill after a family member gets COVID might lower infection rates and delay symptoms, though the study's main findings w…
Apr 4, 2026
Infectious Disease
Cohort
Symptom clusters from participatory surveillance data align with specific respiratory pathogens in Dutch and Italian cohorts
Can your cough tell you which virus you have? Symptom patterns may hold clues
An observational cohort study of symptomatic participants in Dutch and Italian participatory surveillance platforms used Non-negative Matrix…
Certain cough and cold symptom patterns consistently point to specific viruses like SARS-CoV-2 or the flu across different European countrie…
medRxiv
Apr 4, 2026
Infectious Disease
Cohort
Retrospective study finds 61% of vaccinated, boostered individuals neutralize Wuhan-Hu-1 SARS-CoV-2 variant
How well do vaccine antibodies fight different COVID variants?
A retrospective cohort study of 100 vaccinated and boostered individuals found 61% effectively neutralized the Wuhan-Hu-1 SARS-CoV-2 variant…
Most vaccinated people's antibodies stopped the original virus, but only a few could also block newer variants like Beta, Delta, and Omicron…
Frontiers
Apr 4, 2026
Questions about SARS-CoV-2 infection
Can the FindPart-w model help identify which SARS-CoV-2 lineage group my child has?
Yes, the FindPart-w model can identify SARS-CoV-2 lineage groups, but it is a research tool not yet available for individual patient use.
Full answer →