It's a matter of money and research. Take as an example haemocrit levels which tend to be pretty important (the timescale may be slightly out but it's roughly right).
The Finnish endurance athletes knew the benefit of blood doping (pumping some extra red blood cells in to increase oxygen carrying capacity) in the 1970s. I'm not sure it was banned then
but it soon was and it came with all sorts of problems, obtaining 'clean' red blood cells, storage when competing abroad ...
Come the 1980s someone invents EPO. Boosts red blood cells and no tests to detect it. Becomes the drug of choice, much easier and cleaner then blood doping.
1994
and tests are being developed to detect EPO. Rumour has it that the Olympics (where testing was first used) returned so many positives they were buried.
Word quickly gets round EPO is no longer 'safe' close to competition. Still used a bit for out of competition preparation (testing easily avoided out of competition) and timescales are well known for clearing EPO.
The smarter cookies move back to blood doping for in-competition use. Some rumours that veterinary products being used which don't have the hang up of requiring freezing
Rumours that top teams put in place logistic systems to deliver blood products to teams during the tour. Preference is for third party blood which doesn't have the detrimental effect on training of drawing own blood (and possible cock-up of taking blood out of competition which may have EPO .... traces).
Until 2004
impossible to detect third party blood of right group. Test finally developed in time for Olympics and Tyler Hamilton is high profile doper caught by this method.
Athletes then move on to removing own blood for re-use. Have to be careful to make sure removed blood is free of other drugs. Also removing and re-using leads to classic 'cock-ups' of mislabelling and wrong blood being pumped in.
Tests presently known about can't detect 'own-blood' transfusions although it may be that a test has been developed to tell difference between 'old' red cells and fresh red cells (hence Vino's positive - although the story isn't particularly clear there yet).
Unless you're entirely up to date with medical research who knows what the current 'booster' is. The one thing you can be sure of is that Ferarri will be far more familiar with that research then any of us.