Testing using two components was not considered reliable until February 28, 2020, and it was not until then that federal and local labs received approval to begin testing.
Vipimo kwa kutumia viambajengo havikubainishwa kuwa vinategemeka hadi tarehe 28 Februari 2020, ilikuwa hadi wakati huu ndipo mahabara ya kitaifa na ya mtaani yaliruhusiwa kuendesha vipimo.