PCR tests are sensitive and are bound to yield many positive cases from countries that are experiencing a big wave.SINGAPORE - China resumed outbound leisure travel from Sunday , and removed quarantine requirements for returning travellers.
Even recovered travellers will shed dead viral fragments for quite a while. Singapore, therefore, did not consider doing this, as it would merely confirm what is already known and expected, added Mr Ong.A: Waste water tests are best done on residential premises such as dorms and housing estates, because viral fragments can only be detected from solid wastes, said Mr Ong.
However, travel volume between Singapore and China is already low – currently less than 10 per cent of pre-Covid-19 norms – he said.This already limits the number of imported infections, more so than imposing a blanket PDT requirement on all travellers from China, he added.
Why no PFT and yet increased PPE for ground staff?