yes...because 300 studies isn't enough as it doesn't agree with your ideas of how it should be, thats how we do science now!!!.
From the link:
The available evidence about the adverse effects of influenza and influenza vaccinations in pregnant women and their babies relies almost exclusively on observational studies.
A systematic review of safety outcomes (fetal death, spontaneous abortion, congenital malformation) associated with influenza vaccination during pregnancy6 included 1 case-control, 1 cross-sectional and 17 cohort studies, but no randomized trials (RCTs), though citing one of them.
...
Observational studies are prone to bias, specifically to confounding-by-indication and to healthy-vaccinee bias. The former concerns patients with underlying diseases, who are more likely to be vaccinated than healthy people; this bias leads to underestimate the vaccine effectiveness, because the less healthy population is inherently at higher risk of unfavorable health outcomes. The second bias refers to an opposite situation, where patients in worse health conditions (eg with functional impairment, other comorbidities, or the elderly with a short life expectancy) are less likely to adhere to the influenza vaccination. This is a variant of the so called “healthy-adherer effect”, a bias associated with patient behaviour. It can affect health outcomes, that may be incorrectly attributed to the presence or absence of a treatment.
The fact is that there is very little data to suggest flu vaccines provide any real benefit to ANYONE, much less pregnant women. For example, a Cochrane Review on flu vaccination found the following:
We found 52 clinical trials of over 80,000 adults. We were unable to determine the impact of bias on about 70% of the included studies due to insufficient reporting of details. Around 15% of the included studies were well designed and conducted. We focused on reporting of results from 25 studies that looked at inactivated vaccines. Injected influenza vaccines probably have a small protective effect against influenza and ILI (moderate-certainty evidence), as 71 people would need to be vaccinated to avoid one influenza case, and 29 would need to be vaccinated to avoid one case of ILI. Vaccination may have little or no appreciable effect on hospitalisations (low-certainty evidence) or number of working days lost.
We were uncertain of the protection provided to pregnant women against ILI and influenza by the inactivated influenza vaccine, or this was at least very limited.
The administration of seasonal vaccines during pregnancy showed no significant effect on abortion or neonatal death, but the evidence set was observational.
www.cochrane.org
I know it's easier to make vacuous disparaging remarks than it is to actually address the issues with the confounded data in the "300 studies" you referenced, but it's not very compelling,