Need help Bad, mod has been going great but I ran into this problem

[PhYCoZ x20]

        private Vector2 _VirusHands = new Vector2(-1, -1);

        //Bool variables
        private bool Ram = ((_VirusHands.X == -1 && _VirusHands.Y == -1) || npc.ai[1] == 1);

Error is :
c:\Users\bbutl\Documents\My Games\Terraria\ModLoader\Mod Sources\PhYCoZsMod\NPCs\Bosses\Virus\Virus.cs(31,24) : error CS0236: A field initializer cannot reference the non-static field, method, or property 'PhYCoZsMod.NPCs.Bosses.Virus.Virus._VirusHands'
c:\Users\bbutl\Documents\My Games\Terraria\ModLoader\Mod Sources\PhYCoZsMod\NPCs\Bosses\Virus\Virus.cs(31,47) : error CS0236: A field initializer cannot reference the non-static field, method, or property 'PhYCoZsMod.NPCs.Bosses.Virus.Virus._VirusHands'
c:\Users\bbutl\Documents\My Games\Terraria\ModLoader\Mod Sources\PhYCoZsMod\NPCs\Bosses\Virus\Virus.cs(31,71) : error CS0120: An object reference is required for the non-static field, method, or property 'Terraria.ModLoader.ModNPC.npc.get'