Spread of COVID-19 in co-housed cats with no clinical signs.
https://www.nejm.org/doi/full/10.1056/NEJMc2013400
Asymptomatic spread of COVID19 in cats housed together:
https://www.nejm.org/doi/full/10.1056/NEJMc2013400
humans also asymptomatically spread COVID19
Well it can easily be a vector field square where the warp of the vectors defining the space warps the objects within that space.