itcan be spread from the air we breathe ... and also things we touch.
Infectious diseases are caused by germs, such as viruses, bacteria, and parasites. Contagious or communicable diseases are those that can be spread from one person to another. Infectious diseases that commonly occur among children are often communicable or contagious and may spread very easily from person to person
Eating other organisms, breaking down dead matter, and invading another organism
Rna and dna
The main ways you can tell if something is living if it has all of the below * It has DNA/RNA * It reproduces in someway * It is made up of many specialized cells or in the case of the single celled organism one * Reacts to stimuli One organism that can be argued that is living the virus cell. While it reacts to stimuli, has DNA/RNA, and has cells. It can not reproduce on its one it has to attach to another cell to inject that one with particles of virus, and when the cell bursts it spreads the virus cells. A virus cell does not divide or merge with another organism to produce more viruses. Though in a way it does merge it does not merge with one its own kind, thus it is not reproducing to create more virus.
One major problem that makes a viral infection so hard to cure is that they mutate so rapidly. It also hard to find drugs that will work. Tamiflu is an antiviral that acts against an enzyme that the virus needs to break out of the host cell and spread but many viruses are so simple that there are very few ways to stop them.
physical contact and not washing your hands
viruses can be transmitted a number of ways. coughing, sneezing,kissing...etc. Any oral contact or physical contact can spread a good number of viruses from one person to another. Some can even be transmitted just by breathing the same air as another person with this virus.
Viral and bacterial infections are both spread in basically the same ways. A person with a cold can spread the infection by coughing and/or sneezing. Bacteria or viruses can be passed on by touching or shaking hands with another person.Feb 5, 2014Found on Netdocter.
Computer viruses usually spread in one of three ways: from removable media; from downloads off the Internet; and from e-mail attachments. Although the Internet gets a bad rap as a source of viruses, you're no more likely to contract a virus from the Web than you are from packaged software.
You can get a computer virus in any number of ways. Viruses usually spread to your computer disguised as a useful program that you download and install yourself. Viruses can also spread by exploiting bugs in programs many people use, like Internet Explorer, in order to run code on your computer that will let the viruses install themselves. Viruses can spread this way in both emails and files.
In the 21st century it is hard to live without computers so one of the best ways to stop viruses are to install anti-virus softwares into your computer regularly.
Two examples of how computer viruses can be spread include clicking on an unsafe link within an e-mail or downloading a program or software to your computer that contains malware, spyware or another computer virus. To avoid this, make sure that you have Internet security and antivirus software on your computer and that your firewall is turned on.
To put this answer as simply as possible, an organism's genotype can change due to either a random mutation in the DNA/chromosomes or the insertion of DNA from one organism into the DNA of another organism.
They each plant their young on another organism and let their young use the organism as a host for them to feed
Germs can be spread in many ways from person to person. Physical contact such as handshakes or hugging can lead to the spread of germs. Drinking after another person can also lead to the spread of germs. It is best to avoid contact with individuals who are sick.
Various ways, like common ways such as through touching anyone if it is contagious, drinking or eating something then leaving it out for someone else to sip or eat, or other ways.
there are lots of ways, but there are 2 main possibility's, number 1 is that a big country with that religion concuers a lot of ground and the religion starts to spread, another possibility is that a country with a certain religion gets concquered and that the inhibitants fled the country and spread over the world