Allergy & Immunology
Expert discussions on allergic conditions, immunodeficiencies, drug hypersensitivity, and immunotherapy approaches.
Recent Discussions
How would you advise patients with known stable autoimmune thrombocytopenia regarding the Ad26.COV2.S (Johnson & Johnson/Janssen) vaccine?
For patients with autoimmune thrombocytopenia due to SLE, I favor avoiding vaccines that employ a viral vector due to concerns for viral induced lupus flare.For patients with thrombocytopenia in association with antiphospholipid antibodies, would avoid the Johnson & Johnson (as well as Astra-Zeneca)...
Is there a role for antibody testing to confirm vaccine response for patients on rituximab after COVID-19 vaccination?
It's a great question, but I do not feel that routinely performing COVID antibody testing would help in the management of these patients: We don't know how well most commercial antibody testing correlates with neutralizing antibody/immune-status (esp. if qualitative testing is performed), and I have...
In which patients with autoimmune or inflammatory conditions are you recommending a 3rd dose of the mRNA COVID vaccine?
We found that many of the patients on immune suppressive medications do not have an appropriate response to the initial 2 doses of mRNA COVID19 vaccines. At this point, I recommend a 3rd dose to all the patients on immune suppressive medications, prioritizing the ones with known low titers of SARS-C...
How are you timing the third dose of the COVID-19 mRNA vaccine in patients on rituximab?
At this point, I am advising the patients to do the 3rd vaccine at least 5 months after the previous Rituximab dose. Whenever feasible, I test them for B cell reconstitution prior to vaccination, and may delay the vaccination if B cells are undetectable.
Should we recommend the COVID-19 booster vaccine to patients who had a DVT or any other complications such as hemolytic anemia or thrombocytopenia from prior vaccine doses?
There are a few case reports of VTE following COVID-19 vaccinations (approximately 10 based on my PubMed review today). However, VTE has a high incidence of 0.1% in the general population and much higher after age 45 (Mary Cushman, PMID 17433897), so determining a causal relationship between the vac...
Do you recommend COVID vaccination in patients with antiphospholipid antibody positivity or other prothrombotic states not on anti-coagulation?
There are hypothetical reasons that the COVID-19 vaccine might increase thrombophilia in individuals with APS/APLAs. However, the only controlled study I could find, Absence of hypercoagulability after nCoV-19 vaccination: An observational pilot study by Campello et al., PMID 34246010 did not show a...
Do you avoid dupilumab (IL-4 inhibition) for severe asthma in patients already taking a biologic agent for RA?
Dupixent (dupilumab) is a humanized monoclonal IgG4 antibody that works by blocking the signaling of interleukin-4 (IL-4) and interleukin-13 (IL-13). This is achieved by binding to the IL-4Rα subunit. When dupilumab occupies this subunit, it prevents IL-4 signaling via the Type I receptor and both I...
Would you have any hesitation to use belimumab in a patient with IgA deficiency?
For the most part, I would not have any hesitation as most patients with IgA deficiency are asymptomatic and do not experience recurrent infections. If they do have a history of recurrent sinopulmonary infections, they should be seeing an immunologist and may require IVIg depending on the severity. ...
With the approval of oral JAK inhibitors such as Upadacitinib for atopic dermatitis, how are you considering its safety profile in comparison to traditional immunosuppressants such as prednisone, methotrexate, azathioprine, and mycophenolate?
In every treatment situation, we need to help the patient understand the potential benefits and potential risks of a medication. In my opinion, Upadacitinib is in a completely different category than traditional immunosuppressants such as prednisone, methotrexate, azathioprine, and mycophenolate, si...
Is there any PFT criteria that you use in guiding decision making to offer transbronchial lung cryobiopsy to patients with interstitial lung disease?
We really don't have any specific PFT criteria to identify the need for cryobiopsy, but apply the same guidelines to determine the need for open lung biopsy in the decision-making process. Even with the risk of bleeding, cryobiopsy is safe. Unless someone is at high risk for ventilator dependence, o...