The Adverse Reactions of Pfizer BioNTech COVID-19 Vaccine Booster Dose are Mild and Similar to the Second Dose Responses: A Retrospective Cross-Sectional Study.

Background: Like other vaccines, Pfizer BioNTech's COVID-19 vaccine efficacy against SARS-CoV-2 virus infections begins to decline within a few months after the 2 dose. On August 12, 2021, the FDA allowed additional Pfizer BioNTch's COVID-19 vaccine dose (3 or booster dose) for individuals with weakened immunity. This study aimed to evaluate the short-term adverse reactions (ADRs) of the 2 and the 3 doses of the Pfizer BioNTech COVID-19 vaccine.

The Impact of ABO Blood Grouping on COVID-19 Vulnerability and Seriousness: A Retrospective Cross-Sectional Controlled Study among the Arab Community.

Studies have noted that some ABO blood types are more susceptible to COVID-19 virus infection. This study aimed to further confirm the relationship between different blood groups on the vulnerability, symptoms, cure period, and severity among COVID-19 recovered patients. This cross-sectional study approached the participants from the Arab community via social media (mainly Facebook and WhatsApp).

Both and Metformin Extract Improved the Function and Histological Structure of Thyroid Gland in Polycystic Ovary Syndrome Rats through Antioxidant Mechanism.

There is increasing proof that polycystic ovary syndrome (PCOS) is associated with the increased frequency of thyroid disturbances. Chamomile ( L.) herb and metformin showed therapeutic efficacy against polycystic ovary syndrome (PCOS).

Biochemical and histological evidence of thyroid gland dysfunction in estradiol valerate model of the polycystic ovary in Wistar rats.

Thyroid defects and polycystic ovary (PSO) disease are prevalent endocrine problems among humans. While various studies investigated the ovarian function and histological alterations during estradiol valerate model of PCO, yet, there were no available studies examining thyroid gland function and histology. Therefore, the present study aimed to investigate linkage between estradiol valerate-induced PCO and the development of thyroid dysfunction in rats.