Sentence examples for occasions of virus from inspiring English sources

Infection was defined by the persistence of HIV-1 antibodies after 18 months of life or by the detection, on at least 2 occasions, of virus markers (proviral DNA, or viral RNA).

In this study, we investigate the effect of CDs on the replication of virus by using pseudorabies virus (PRV) and porcine reproductive and respiratory syndrome virus (PRRSV) as the models of DNA virus and RNA virus, respectively.

with serial 10-fold dilution of virus.

Organisms concomitantly isolated with M. pneumoniae from the respiratory tract included herpes simplex virus type 1 (2 occasions), adenovirus (2 occasions), cytomegalo virus (1 occasion), respiratory syncytial virus (1 occasion), and bacterial isolates (2 occasions: Acinetobacter species, 1, and Enter obacter cloacae, 1).

On 2 occasions, influenza virus (H5N1) was isolated from smuggled chickens (Appendix Table).

Blood contains large amounts of virus.

All world systems may experience occasions of malfunction and failure.

Two occasions of being observed are required.

Overall 32 occasions of sampling were performed.

One hundred and fifty two occasions of people smoking were observed (43% of all occasions observed) (Table  1).

On some occasions, when the virus was administered by an intravenous or intranasal routes, a higher level of fatalities was observed that was sufficient for vaccine efficacy studies.