I could be wrong, but my understanding is that the quant is generally more important than the verbal. If you're doing something like community health/health behavior or whatever, maybe a lower verbal wouldn't look as good. But your verbal doesn't even seem that low to me. It's not great, but it seems adequate, esp if you're gonna do something like epi or biostats. I don't know about scholarship requirements, but I've seen schools post their general GRE cutoff scores for admission as 500 verbal and 550 quant, so if that's the case then you seem safe.