COVID vaccines are safe for pregnant and breastfeeding women
According to data from the COVAD study, which comprised two global cross-sectional surveys conducted in 2021 and 2022, the COVID-19 vaccine appeared safe for pregnant and breastfeeding women with autoimmune diseases (AID).
Presenter Laura Andreoli, MD, PhD, of the University of Brescia (Italy), said that, although pregnant patients with AID reported more adverse events related to vaccination, these rates were not significantly higher than those among pregnant, healthy control persons who were without AID. No difference in adverse events was observed between breastfeeding women and healthy control persons, and the incidence of disease flares did not significantly differ among all groups.
“In summary, this study provides initial insights into the safety of COVID-19 vaccination during the gestational and postpartum periods in women with autoimmune diseases. These reassuring observations will hopefully improve clinician-patient communication and address hesitancy towards COVID-19 vaccination, as the benefits for the mother and fetus through passive immunization appear to outweigh potential risks,” Dr. Andreoli said in an interview.
“The large number of participants and the global geographical spread of the COVAD survey were very beneficial in gaining access to this important subset of patients,” added Dr. Andreoli. However, she acknowledged that patients with low socioeconomic status and/or high disability were likely underrepresented. While no data on pregnancy outcomes have been collected thus far, Dr. Andreoli expressed the desire to include them in the study’s follow-up.
The COVAD survey data also indicate that, in general, vaccine hesitancy among patients with AID is decreasing; from 2021 to 2022, it declined from 16.5% to 5.1%, as Dr. Machado indicated in his presentation.
Multiple factors contribute to breakthrough infections
The risk of breakthrough SARS-CoV-2 infections after vaccination varies among patients with rheumatoid arthritis and rheumatic or nonrheumatic autoimmune diseases, primarily depending on the underlying condition rather than the immunosuppressive medication. Environmental factors also appear to play a role. This complex landscape emerges from a further analysis of the COVAD survey dataset.
Dr. Alessia Alunno
Alessia Alunno, MD, PhD, of the University of L’Aquila (Italy), presented a detailed and occasionally counterintuitive picture of similarities and differences among young adult patients (aged 18-35 years), mostly women, with various rheumatic and nonrheumatic diseases in relation to COVID-19. Most notably, the type of disease seemed to have more significance than the immunosuppression resulting from the treatment regimen. This held true for vaccine safety as well as for the risk of breakthrough COVID-19 and symptom profiles.
Patients with rheumatic disease (RMD) and nonrheumatic autoimmune disease (nr-AD) had significantly different therapeutic profiles on average. Before vaccination, 45% of patients with RMD used glucocorticoids (GC), and 91% used immunosuppressants (IS). In contrast, only 9.5% of nr-AD patients used GC, and 21% were taking IS.
Interestingly, the overall prevalence of reported SARS-CoV-2 infections was not influenced by medication and was practically identical (25% to 28%) across all groups. However, there were intriguing differences in the occurrence of infections before and after vaccination between disease groups. Prevaccine infections were less frequent among patients with RMD compared with healthy control persons (adjusted odds ratio, 0.6), while the rates were similar among patients with nr-AD and healthy control persons. On the other hand, breakthrough infections were more frequent in patients with RMD (aOR, 2.7), whereas the rate was similar between healthy control persons and patients with nr-AD.
Despite a much lower rate of GC/IS use, patients with nr-AD experienced repeated infections more frequently. In contrast, patients with RMD were less prone to multiple infections, even compared with healthy control persons (aOR, 0.5).
Regarding the disease profile, fewer than 5% of all infected patients required advanced therapies for SARS-CoV-2 infection. Notably, all SARS-CoV-2 infections in patients with nr-AD were symptomatic, whereas among patients with RMD and healthy control persons, the incidence of asymptomatic infections was 3%. The rate of hospital admissions was 4% for patients with RMD, compared with 2% for patients with nr-AD and 1% for control persons. The RMD group exhibited some differences between prevaccine infections and breakthrough infections, including a significantly lower frequency of loss of smell and taste during breakthrough infections. Overall, patients with RMD and COVID-19 experienced cough, runny nose, throat pain, nausea, and vomiting more frequently. In contrast, patients with nr-AD had a much higher risk of skin rashes during breakthrough infections (aOR, 8.7).
Vaccine adverse events (AEs) were also influenced by the underlying disease. Patients with RMD and those with nr-AD were more likely to experience mild AEs after the first or second dose, compared with healthy control persons (adjusted OR, 2.4 and 2.0, respectively). The most common early, mild AEs across all groups were injection-site pain, headache, and fatigue, but they occurred more frequently in the nr-AD group than in the RMD or healthy control group. Additionally, fever and chills occurred more frequently among the nr-AD group. Late, mild AEs and severe AEs were rare and affected all groups equally.
“The overall incidence of AEs was very low. Our results certainly do not undermine the safety of vaccines,” Dr. Alunno said.
Disease flares were more common after vaccination (10% with RMD and 7% with nr-AD) than after infection (5% with RMD and 1.5% with nr-AD). Furthermore, in many cases, after vaccination, flares required a change of medications, particularly for patients with RMD.
Dr. Naveen Ravichandran
Dr. Naveen Ravichandran
Additional results from the COVAD survey from January to July 2022, presented by Naveen Ravichandran, MD, DM, of Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India, revealed a higher prevalence (OR, 1.2; P = .001) of breakthrough infections among patients with RA. A total of 22.6% of patients with RA experienced breakthrough infections, compared with 20.6% for patients with other autoimmune rheumatic diseases and 18.4% of healthy control persons. Hospitalizations and the need for advanced treatment were also more common among patients with RA (30.9%) than among healthy control persons (13.9%). Patients with RA who had breakthrough infections tended to be older (closer to 50 years of age on average) and female, and they were more likely to have comorbidities and mental disorders. The human development index of the patient’s country of residence also played a role. Further research is necessary to understand how breakthrough infection outcomes are affected by a patient’s socioeconomic situation.
According to Dr. Ravichandran, medication was not a significant factor, except for the use of steroids and rituximab, which were associated with a higher risk of severe COVID-19 and hospitalization. Patients using rituximab, in particular, faced significantly increased odds for hospitalization (OR, 3.4) and severe breakthrough COVID-19 (OR, 3.0).
Dr. Kim Lauper
Session moderator Kim Lauper, MD, of the University of Geneva, cautioned: “The roles of disease and medication are challenging to separate. Some diseases require a more aggressive immunosuppressive regimen. It’s possible that different diseases affect the immune system differently, but it is not easy to demonstrate.”
The complications observed in the data warrant further study, as mentioned by Dr. Schulze-Koops: “We have a problem tied to the time line of the pandemic, where we had different viruses, different population behaviors, different treatments, and different standards of care over time. We also have differences between ethnic communities and regions of the world. But most importantly, we have different viruses: From the original strain to Delta to Omicron, we know they have very different clinical outcomes. I believe we need more scientific research to unravel these factors.”
Dr. Ørbo, Dr. Ravichandran, Dr. Andreoli, and Dr. Alunno reported no relevant financial relationships. Dr. Machado has received grants and/or honoraria from AbbVie, Bristol-Myers Squibb, Celgene, Eli Lilly, Galapagos, Janssen, Merck Sharp & Dohme, Novartis, Orphazyme, Pfizer, Roche, and UCB.
A version of this article originally appeared on Medscape.com.