@fitterhappierAJ So let me see if I understand this. No durable immunity from the first four exposures, leading to yet another infection, but somehow the fifth is the charm?
@fitterhappierAJ所以让我看看我是否理解这一点。前四次暴露没有持久的免疫力，导致另一次感染，但第五次是魅力？
@fitterhappierAJ So let me see if I understand this. No durable immunity from the first four exposures, leading to yet another infection, but somehow the fifth is the charm?
@fitterhappierAJ所以让我看看我是否理解这一点。前四次暴露没有持久的免疫力，导致另一次感染，但第五次是魅力？