Sentence examples for both areas were negative from inspiring English sources

All human serum samples and ticks from both areas were negative by serologic assay and polymerase chain reaction, respectively.

Volunteers should not have lived in endemic areas, were negative for HIV, HBV and HCV antibody screening, and were excluded when presenting with any acute or chronic medical conditions, evidence of abnormality in clinical or laboratory findings, pregnancy, previous history of malaria, or positive antibody response to PfCS102 by ELISA.

Uninjured areas were negative for these markers.

Most normal areas were negative, as were cysts.

RT-PCR results of throat and nasal swabs were positive twice for coronavirus, but coronavirus cultures from these areas were negative.

The crude concentration indexes for all levels and any public health care utilization for the non-slum areas were negative, indicating that health care utilization was concentrated among the poor in the non-slum areas.

The staining of TGF-β and PTHrP was mainly observed on the cytoplasm of cells in the breast tumor tissues (Fig.  1a, c), and most of the stroma areas were negative staining.

Atelectasis and poorly ventilated lung areas are negative consequences of general anesthesia observed in adult as well as in children.

In corpses, the nuclei kept outside the central area were AIP-positive, whereas those inside the central area were negative (Figure 5C and D), suggesting that AIP bridges are enzymatically degraded in the central area.

All 63 samples from animals in the control area were negative.

The case of A − B in the slow slip area being negative (conditionally stable) will be discussed later.