FIG. 9.
Explant reactivation. Ten mice from each of the groups shown in Fig. 8 were selected randomly, and the TG were removed on day 30 p.i. and individually incubated in tissue culture media at 37°C. Aliquots of the tissue culture media were removed daily for up to 21 days and inoculated onto RS cell monolayers to look for the presence of reactivated virus.