I recently came across this article
www.medpagetoday.com/infectiousdisease/vaccines/91631
which explains that the vaccines (Pfizer & Moderna) provide hardly any protection for those who are organ transplant patients or those taking anti-metabolites medication such as mycophenalate. Not good news for people like my mum who are taking this medication.
Im hoping they will come up with something to help these people.