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Trapping of viral particles by diosmectite. Diosmectite was incubated with spike protein RBD (a) and heat-inactivated severe acute respiratory syndrome coronavirus 2 (CoV-2) (b) at different concentrations. The suspension was then probed with the anti-spike protein RBD antibody. Diosmectite alone was used as a negative control (CTRL). Images are at × 1000 magnification and represent three separate experiments.
