@SerpinaLonghaul @LazarusLong13 There has been lots of contact tracing outside the US. Virus transmission doesn't change when you cross a political boundary.
@SerpinaLonghaul @LazarusLong13 在美国以外有很多接触者追踪。当您跨越政治边界时，病毒传播不会改变。
@SerpinaLonghaul @LazarusLong13 There has been lots of contact tracing outside the US. Virus transmission doesn't change when you cross a political boundary.
@SerpinaLonghaul @LazarusLong13 在美国以外有很多接触者追踪。当您跨越政治边界时，病毒传播不会改变。