For instance, Shi et al. synthesized a stratified magnetic core/multi‐shell Fe2O3@SiO2@Eu‐MOF@Tb‐MOF nanoballs.[23] Combined with different antibodies or mRNA sequences, these nanoballs can sensitively detect different acute myocardial infarction biomarkers, such as CK, myoglobin (MB), and troponin I (cTnI) (Figure 3c). The gene discussed is TNNI3; the disease is myocardial infarction.