Emerging Pathogens, Vaccine and Breakthrough Infection News and Medical Cases
No significant difference in hospitalization between immunized and non-immunized found for SARS-CoV-2 Beta variant
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A study of vaccinated and unvaccinated residents of Bangladesh observed that ChAdOx1 could not prevent the new infection or severe COVID-19 disease outcome with single dose when infections were mostly caused by B.1.351 (the Beta) variants of SARS-CoV2.
About 39% (n = 42) of the respondents were infected after the COVID-19 vaccination. The first dose of ChAdOx1 nCoV-19 vaccine was received by 40 (37.0%) cases and both doses were completed by only 2 (2%) cases. The average duration between vaccination (partially or completely immunized) and COVID 19 diagnosis was 32 (±17) days.
The hospitalization rate of comorbid patients was 23.5% among the immunized and 24.1% among the nonimmunized groups. There was no significant difference in duration of hospitalization either (p=0.78).
Genomic analysis of SARS-CoV-2 variants of concern identified from the ChAdOx1 nCoV-19 immunized patients from Southwest part of Bangladesh
Al-Emran HM, Hasan MS, Setu MA, Rahman MS, Alam AR, Sarkar SL, Islam MT, Islam MR, Rahman MM, Islam OK, Jahid IK. Genomic analysis of SARS-CoV-2 variants of concern identified from the ChAdOx1 nCoV-19 immunized patients from Southwest part of Bangladesh. Journal of Infection and Public Health. 2021 Dec 7.
Post-Vaccination IgG4 and IgG2 Class Switching is linked to Increased Risk of SARS-CoV-2 Infections A new study published in Infectious Disease Practice has revealed a concerning correlation between the class switching of antibodies after COVID-19 mRNA booster vaccinations and a heightened risk of breakthrough infections. Specifically, the study found that elevated levels of IgG4 and IgG2 antibodies, which increase significantly following the third mRNA dose, are linked to an increased risk of symptomatic SARS-CoV-2 infections. The study followed a longitudinal cohort of 83 healthcare workers who received three vaccine doses, with an additional 66 participants analyzed at a specific timepoint (T9, May 2022), four months after the first booster. Conducted in Spain, the research tracked immune responses over nearly three years, revealing that the proportion of non-cytophilic antibodies (IgG4 and IgG2) increased relative to cytophilic subclasses (IgG1 and IgG3) after the booster. Th...
A previously hypertensive 56-year-old male presented with the subacute onset of severe constipation, urinary retention, erectile dysfunction, sudomotor failure, sicca symptoms, non-reactive pupils and severe orthostatic hypotension shortly after receiving the second dose of the Comirnaty mRNA vaccine against COVID19. Autonomic testing revealed severe cardiovagal, adrenergic and sudomotor impairment, and tonic 'half-mast' pupils with evidence of sympathetic and parasympathetic denervation (see Figure). T ilt-table testing demonstrated a drop in blood pressure from 140/90 mmHg supine to 54/35 mmHg after two minutes at 60 degrees, with no heart rate response. There was no heart rate response to Valsalva maneuver and sympathetic skin responses in the hands and feet were absent. Sweat testing demonstrated complete anhidrosis. Pathological α3-ganglionic ACHR antibodies were positive in serum as detected by a new flow cytometric immunomodulation assay. Malignancy wa...
A 25-year-old female developed partial loss of smell 2 days after the injection of the AstraZeneca vaccine (first injection). The taste evaluation was normal. Patient did not take any medication and did not follow olfactory training. She reported that the smell disorder lasted 10 days. Patient did not report adverse event after the second vaccine injection. A 27-year-old female experienced loss of smell after the first injection of the AstraZeneca vaccine. The patient medical history was unremarkable. She perceived an improvement of smell sense 9 days after the vaccine without olfactory training or medical treatment. Patient did not report adverse event after the second vaccine injection. A 51-year-old female developed total loss of smell 2 days after the first injection of AstraZeneca vaccine. She also reported arthralgia, fever, and chills during a few days. The total loss of smell persisted one week with a subsequent progressive improvement of smell. The patient report...
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