The three companies from Gujarat whose kits have been validated are LabCare Diagnostics, Premier Medical Corporation, Valsad and Meril Diagnostics, Vapi. Among the several guidelines mentioned by ICMR, one is that a false negative test result may occur if the level of antigen in a sample is below the detection limit of the test or if the sample was collected or transported improperly.
ICMR guidelines emphasize that a negative test result did not eliminate the possibility of Covid infection. “Individuals with CT values greater than or equal to 34 are unlikely to have replication-competent virus. Negative results from patients with symptom onset outside of one to five days of symptom onset should be treated as presumptive,” ICMR said.