Longitudinal determination of BNT162b2 vaccine induced strongly binding SARS-CoV-2 IgG antibodies in a cohort of Romanian healthcare workers.

Mass vaccination against the disease caused by the novel coronavirus (COVID-19) was a crucial step in slowing the spread of SARS-CoV-2 in 2021. Even in the face of new variants, it still remains extremely important for reducing hospitalizations and COVID-19 deaths. In order to better understand the short- and long-term dynamics of humoral immune response, we present a longitudinal analysis of post-vaccination IgG levels in a cohort of 166 Romanian healthcare workers vaccinated with BNT162b2 with weekly follow-up until 35 days past the first dose and monthly follow-up up to 6 months post-vaccination.

Extremely rare "daisy-like" crystals in urinary sediment can be due to a sampling artifact.

Manual urine sediment analysis of a sample obtained from a 5 year old child by our clinical diagnostics laboratory revealed abundant "daisy-like" crystals, which have been first described in 2004 and found to be extremely rare in a follow-up publication by the same research group. To date only 12 samples have been described in the literature containing such crystals. Upon further investigation on how the sample was obtained, we were able to reproduce the process without any biological specimen involved.