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Background: Many coronavirus disease 2019 (COVID-19) vaccines were approved worldwide. Their safety was the primary concern. In Egypt, Oxford-AstraZeneca (AZ) vaccine was the first approved vaccine initially for healthcare workers (HCWs). Objective: We aim to determine adverse events and hematological abnormalities following the COVID-19 AZ vaccine and estimate the infection rate of the candidates by COVID-19 between the first and second doses of vaccination. Methods: Within 8-10 days of receiving their initial dose of the AZ vaccine, 909 HCWs were assessed for adverse events as part of a prospective longitudinal study. Complete blood counts (CBCs) were evaluated before and one month after vaccination. Results: 37.2% of the candidates experienced side effects following vaccination. Pain at the injection site was the most common (25.4%) and more frequent in participants between 20 and 40 years (27.9%). The mean total leukocyte count (TLC), absolute leukocyte count (ALC), absolute neutrophil count (ANC), and absolute monocyte count (AMC) increased one month following vaccination (P < 0. 001). Sixty-six vaccinated HCWs were infected with COVID-19 between the two vaccine doses. 82% were infected after 14 days of the first dose, while 18% were infected before 14 days (P < 0.0001). Conclusions: Most of the vaccinated personnel did not experience any side effects after the first dose of the vaccine. Furthermore, the most common complaints were pain at the injection site, fatigue, fever, headache, arthralgia, myalgia, and chills. Infected people with COVID-19 after the first dose had significantly more severe disease if they were infected before 14 days than those who got infected later on. [ABSTRACT FROM AUTHOR]

(1) Background: Vaccination may be a key intervention to prevent infection in chronic hemodialysis (CHD) patients. This study aimed to determine the COVID-19 vaccination status in Egyptian CHD patients and to analyze the safety and detailed side effect profile of the COVID-19 vaccine among these patients. (2) Methods: This survey-based study was conducted on 670 end-stage renal disease (ESRD) patients on CHD from 3 December 2021 to 5 February 2022. Subjects were asked about sociodemographic characteristics, clinical and therapeutic data, in addition to their COVID-19 vaccination status. If the subject had been vaccinated, we inquired about the type of vaccine and the side effects that occurred within a few days after administration of the first and second dose of the COVID-19 vaccine. Additionally, subjects were asked about the onset of side effects (days from vaccination), timing of maximum symptoms, intensity of symptoms and their effect on activity and need for medical attention. (3) Results: The study included 670 CHD patients with a mean age of 50.79 years; 58.1% were females. The vast majority (614; 91.6%) of the studied patients received two doses of the vaccine. Side effects were more commonly reported after the first dose than the second dose. The main side effects reported were generalized weakness/fatigue (56%), headache (43.8%) and fever (40.4%), and sore arm/pain was also reported (29.3%). Adverse events mostly occurred within one day after vaccination and the maximum symptoms usually happened on the second day. The median duration of symptoms was 3 days with a maximum duration up to 5 days. The univariate logistic regression analysis showed that male gender (OR 1.848; (95% CI, 1.242–2.749), p = 0.002), age (OR 0.981; (95% CI, 0.969–0.993), p = 0.003), smoking (OR 6.067; (95% CI, 3.514–10.475), p < 0.001), duration since starting HD (OR 0.998; (95% CI, 0.998–0.999), p < 0.001), associated comorbidities (OR 2.202; (95% CI, 1.478–3.281), p < 0.001) and prior COVID-19 infection (OR 3.318; (95% CI, 1.952–5.642), p < 0.001) were the main determinants of adverse events related to COVID-19 vaccination. (4) Conclusions: our preliminary findings support the favorable short-term safety profile of the COVID-19 vaccine among CHD patients, and hence can reassure both clinicians and patients, as well as further promote COVID-19 vaccine administration among these patients. [ABSTRACT FROM AUTHOR]

Background: This study aimed to evaluate the Egyptian population's preference and awareness related to available COVID-19 vaccines and to determine different factors that can affect beliefs concerning these vaccines., Methods: A cross-sectional web-based study was carried out among the general population in Egypt. Data collection was conducted via an online questionnaire., Results: About 426 subjects participated in the survey. Vaccine preference is nearly equally even (50%) among all respondents. There was no significant difference in vaccine preference according to age, gender, residence, educational level, or social status. About 50% of public respondents mentioned that both AstraZeneca and Sinopharm vaccines do not offer protection against new variant COVID-19 strains. Healthcare workers are the lowest respondents to agree that vaccines offer protection against new COVID-19 variants (10.9%) compared to unemployed respondents (20.3%) and other professions (68.8%) with a statistically significant difference ( p < 0.005). Safety of vaccine administration among children below 18 showed statistical differences for gender and educational level predictors., Conclusions: Most of the study population has satisfying knowledge about the COVID-19 vaccine. Continuous awareness campaigns must be carried out so that the people's background is updated with any new information that would help in raising the trust in vaccination.

Background: Awareness about the COVID-19 vaccine's adverse effects is crucial for gaining public trust. As we still lack proof of vaccines' safety, this survey aimed to investigate Egyptians' general awareness of the Sinopharm and AstraZeneca vaccines against COVID-19 and provide considerable evidence on their side effects and complications. Methods: A cross-sectional questionnaire-based study was conducted in Egypt between 20 September and 10 October in 2021, with multiple-choice questions (MCQs) covering all data on vaccine administration confusion, adverse effects or intensity, and complications. Results: Among the 390 participants, 42.3% reported being hesitant before receiving one of the vaccines. About 40.3% of participants were previously infected before getting vaccinated while only 4.6% reported being infected after vaccination. The AstraZeneca vaccine demonstrated higher side effects and symptoms than the Sinopharm vaccine while the Sinopharm vaccine showed a significantly higher rate of COVID-19 infection after vaccination. Conclusions: People with higher educational levels and chronic respiratory diseases represent an excellent model for accepting COVID-19 vaccination. A booster shot is recommended for people vaccinated with the Sinopharm vaccine due to a significantly higher rate of COVID-19 infection after vaccination; however, the Sinopharm vaccine shows a more acceptable safety profile. [ABSTRACT FROM AUTHOR]