What are the ingredients for ice cream?

Cold milk, vanilla, condensed milk, salt, egg yolks
this ok?

The ingredients for plain vanilla ice cream are:
1 cup (250 ml) whole milk.
3/4 cup (150 g) sugar.
2 cups (500 ml) heavy cream.
Pinch of salt.
1 vanilla bean, split in half lengthwise.
6 large egg yolks.
3/4 teaspoon vanilla extract.

I hope this helped! Please take the time to rate, pick the Brainliest answer (not necessarily mine!), and thank me if you feel I helped with this question! Thank you, it helps me a lot. :) 

What happens to the influenza virus every 20-40 years and why?