issues associated with them, and in early january we hope to have the first tranche of data that will give us some indication as to whether the systems are decreasing infection rates and over the forthcoming school year we will get a better understanding of the impact. so school year we will get a better understanding of the impact. 50 in understanding of the impact. so in terms ofjust _ understanding of the impact. so in terms ofjust the _ understanding of the impact. so in terms ofjust the technical- terms ofjust the technical logistics of rolling out ventilation units, because the government has said that it will fund 7000 ventilation units, is it pretty straight forward?— ventilation units, is it pretty straight forward? ventilation units, is it pretty straiaht forward? . . , straight forward? there are a number of different issues _ straight forward? there are a number of different issues such _ straight forward? there are a number of different issues such as _ straight forward? there are a number of different issues such as does - straight forward? there are a number of different issues such as does the l of different issues such as does the room have enough plug sockets, how many units are you going to put in, are there other issues as well such as delivering the units? are cleaning the filter is needed? there are practical issues that really need to be understood in order for the role it to be effective. and need to be understood in order for the role it to be effective.- the role it to be effective. and in terms of the _ the role it to be effective. and in terms of the cost, _ the role it to be effective. and in terms of the cost, how— the role it to be effective. and in terms of the cost, how does - the role it to be effective. and inj terms of the cost, how does that work out?—