ESXi 5.0 469512 Update

HI All,

  I found 3 Host with above built need 26 updates when i scan the Vcentre --?Update Manager.

But when i look the dates and found  VMware ESXi 5.0 Complete Update 2 - 20-12-2012 So Can i install only this ?

or do i need to install all the old ones too? ( I can see update1 etc etc...)

AS