> The drug, BromAc – which is made with an enzyme found in pineapples -was found to dissolve the spike proteins that Covid-19 uses to infect human cells.

So not pineapples themselves but a derivative.

> It has been repurposed into a nasal spray that researchers hope will stop the virus' spread from the nose and throat to the lungs. A trial on patients at the Royal Melbourne Hospital could start next month.

So not an injection or anything, just sort of a nasal barrier.