Are Vaccines Proven Safe and Effective? Its Time for an Adult Conversation about this Topic and it starts here. Are Vaccines Proven Safe and Effective? Its Time for an Adult Conversation about this Topic and it starts here. Are Vaccines Proven Safe and Effective? Its Time for an Adult Conversation about this Topic and it starts here. Are Vaccines Proven Safe and Effective? Its Time for an Adult Conversation about this Topic and it starts here.