With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: Antibody tests for the 2019 coronavirus disease are widely used .
text_B: As of 19 March 2020 , antibody tests ( which can not just detect active infections , but also determine whether a person had been infected in the past ) were in development , but not yet widely used .
REFUTES.