Lyme from ticks, West Nile from mosquitoes.
Vectors play very important role in spread of many diseases. The microorganism spends dominant or recessive stage of it's life cycle. Without the vector the disease can not spread in most of the cases. Malaria and plague are two important vector born diseases.
parvo and mange.
scurvy
Three commonly spread diseases include the common cold, influenza, and streptococcal pharyngitis. The first two are viral diseases, and the third is a bacterial infection.
There are more diseases spread by insects than can fit in this answer, but two are notable for their kill rate. Firstly the 'Black Death', the plague which killed a third of the population of Europe in the 17th century was spread by fleas which lived on rats and secondly malaria, spread by mosquitoes, kills millions of people every year in tropical areas.
Vector addition derives a new vector from two or more vectors, and vector resolution is breaking a vector down into its two or more components.
Resultant vector or effective vector
That is usually called the resultant vector.
The two vectors are P & Q..Sum of the two vecotors is P+Q=R..R Is called the resultant vector of this two vector..the action of the resultant vector R is equal to the actions of two vectors P & Q..
Its called your "Resultant Vector"
A resultant Vector.
A vector has direction, where as a scalar does not. When you add two vectors, it is like you are moving one vector to the end of the other vector, and closing off the triangle with a vector for the third side. That third vector is the addition of the first two vectors. The new vector points in a specific direction, so it cannot be a scalar.