condition virus_in_blood develop_rash vaccine no no vaccine no no vaccine no no vaccine no no vaccine no no vaccine no no vaccine no no vaccine no no vaccine no no vaccine no no vaccine no no vaccine no no vaccine no no vaccine no no vaccine no no vaccine no no vaccine no no vaccine no no vaccine no no vaccine no no vaccine no no placebo yes no placebo yes no placebo yes no placebo yes no placebo yes yes placebo yes yes placebo yes yes placebo yes yes placebo yes yes placebo yes yes placebo yes yes placebo yes yes placebo yes yes placebo yes yes placebo yes yes placebo yes yes placebo yes yes placebo yes yes placebo yes yes placebo yes yes