Reassortment is the viral equivalent of sex -- two viruses can meet and swap entire stretches of their genetic material .
这种重组对病毒来说相当于有性生殖-两种病毒有机会互换其全部的的遗传物质。
In these experiments , however , such " reassortment " wasn 't necessary for the mutant virus to change its transmissibility characteristics .
然而,在这些实验中,这样的“重组”以改变病毒的传播特性,不是必须的。
The virus is produced by a reassortment , in which human-adapted h1n1 swaps genes with an h2n2 bird flu .
这病毒是重组产生的,由人-适应h1n1与h2n2禽流感基因互换。
In that virus , one old surface protein , the h , was switched out for a new one in a process called reassortment . The strain went from h2n2 to h3n2 .