Conclusions

Kidney transplant recipients seem to have an antibody response similar to the general population at the early post-COVID-19 period. However, similar to the general population there is a tendency toward lower antibody levels with increasing post-infection duration. Therefore, we suggest caution for humoral immunity in kidney transplant recipients following COVID-19; at least following three months post-infection; follow-up of antibody levels and booster vaccination might be warranted.