The purpose of the study was to assess the knowledge, attitudes, beliefs, and factors associated with the uptake of the influenza (flu) vaccination in women within Saudi Arabia during their pregnancy period. A cross-sectional prospective survey was conducted on 1085 pregnant women at the antenatal clinic over a period of 6 weeks with the provision of influenza vaccination. The questionnaire collected demographic and other data; it included 12 questions on their general knowledge and assessed their attitude toward influenza vaccination, and their awareness of vaccine risk and the potential benefits during pregnancy. The knowledge score obtained was then calculated and compared. A total of 998 patients took part in the questionnaire with a response rate of 92%. There was poor awareness that the flu vaccine is safe to administer during pregnancy (130, 13.1%) and that all pregnant women should receive the flu vaccine (190, 19.1%). Pregnant women with flu vaccine knowledge score of ⩽5 (range 0-12) were significantly less likely to take the vaccine (OR 3.78, 95% CI 2.68-5.26, < 0.001). There was a low uptake of the vaccine (178, 18.1%) and only 29 (3.0%) had previously been offered the flu vaccine by any doctor during their pregnancy. In addition, 255 (25.8%) were against taking the flu vaccine during pregnancy. The knowledge and uptake of the influenza vaccine among Saudi pregnant women are low. One quarter was against the vaccine during pregnancy. Very few believed the flu vaccine to be safe during pregnancy. Rarely, physicians advise their clients to take flu vaccine.

Background Prenatal antibiotic exposure induces changes in infants’ gut microbiota composition and is suggested as a possible contributor in the development of autism spectrum disorders (ASD). In this study, we examined the association between prenatal antibiotic exposure and the risk of ASD. Methods This was a population-based cohort study utilizing the Manitoba Population Research Data Repository. The cohort included 214 834 children born in Manitoba, Canada between April 1, 1998 and March 31, 2016. Exposure was defined as having filled one or more antibiotic prescription during pregnancy. The outcome was autism spectrum disorder diagnosis. Multivariable Cox proportional hazards regression was used to estimate the risk of developing ASD in the overall cohort and in a sibling cohort. Results Of all subjects, 80 750 (37.6%) were exposed to antibiotics prenatally. During follow-up, 2965 children received an ASD diagnosis. Compared to children who were not exposed to antibiotics prenatally, those who were exposed had a higher risk of ASD: (adjusted HR 1.10 [95% CI 1.01, 1.19]). The association was observed in those exposed to antibiotics in the second or third trimester (HR 1.11 [95% CI 1.01, 1.23] and 1.17 [95% CI 1.06, 1.30], respectively). In the siblings’ cohort, ASD risk estimate remained unchanged (adjusted HR 1.08 [95% CI 0.90, 1.30], although it was not statistically significant. Conclusions Prenatal antibiotic exposure is associated with a small increase in the risk of ASD. Given the potential of residual confounding beyond what it was controlled through our study design and because of possible confounding by indication, such a small risk increase in the population is not expected to be clinically significant.

Our findings suggested no clinically significant association between early life antibiotics exposure and risk of autism spectrum disorders, and should provide reassurance to concerned prescribers and parents.

Early childhood antibiotic exposure induces changes in gut microbiota reportedly associated with the development of attention-deficit/hyperactivity disorder (ADHD). We conducted a population-based cohort study to examine the association between antibiotic use in the first year of life and ADHD risk. We included children born in Manitoba, Canada, between 1998 and 2017. Exposure was defined as having filled 1 or more antibiotic prescriptions during the first year of life. ADHD diagnosis was identified in hospital abstracts, physician visits, or drug dispensations. Risk of developing ADHD was estimated using Cox proportional hazards regression in a high-dimensional propensity score–matched cohort (n = 69,738) and a sibling cohort (n = 67,671). ADHD risk was not associated with antibiotic exposure in the matched-cohort (hazard ratio = 1.02, 95% confidence interval: 0.97, 1.08) or in the sibling cohort (hazard ratio = 0.96, 95% confidence interval: 0.89, 1.03). In secondary analyses of the matched cohort, ADHD risk increase was observed in those exposed to 4 or more antibiotic courses or a duration longer than 3 weeks. These associations were not observed in the sibling cohort. We concluded that antibiotic exposure in the first year of life does not pose an ADHD risk on a population level.