Where is the information stating 1000 times?
this British study doesn’t call out 1.000, but does say:
Our study found a 64% increase in the odds of household transmission associated with infection with SARS-CoV-2 Delta variant compared to Alpha... The findings support existing evidence that the Delta variant has a substantially increased transmissibility advantage over the Alpha variant...,
https://khub.net/documents/135939561/405676950/Increased+Household+Transmission+of+COVID-19+Cases+-+national+case+study.pdf/7f7764fb-ecb0-da31-77b3-b1a8ef7be9aa
breaking up the post.
and to really blow your mind, try 50,000x in the US:
the real surprise came when doctors measured the infant’s viral load. It was 51,418 times the median of other pediatric patients. And when they sequenced the virus in the baby recently, they found a variant they hadn’t seen before....Jeremy Luban, a virologist at the University of Massachusetts Medical School, said the viral load in the infant’s nose “in itself, is shocking and noteworthy.” However, he was cautious in speculating that it “could be because of N679S, or simply because it is a [newborn] with an immature immune system, permitting the virus to replicate out of control.”
https://www.washingtonpost.com/health/2021/02/23/newborn-child-covid-variant-viral-load/
we’re not supposed to post from Forbes so I broke the link with a carriage return, but this is Australia - 30 minutes after a Delta infected person entered a hallway, those that opened their doors were infected.
www.forbes.com
/sites/williamhaseltine/2021/06/28/infection-through-fleeting-contact-with-the-delta-variant-leads-to-lockdowns-across-australia/?sh=3da7842a5d4f