The risk of meningococcal infection among homosexuals is 4 times higher than that of heterosexuals. HIV-infected homosexuals have a 10-fold higher risk of meningococcal disease than uninfected homosexuals. 45% of meningococcal cases reported numerous partners and participation in anonymous sex.
Among homosexuals, 32% smoke (compared to 18% of adults in the US), and 48% use drugs (compared to 10% on average).
In New York, the risk of meningococcal infection among homosexuals was 50 times higher than, on average, in German and 13 times above, in Paris 10 times above, in Southern California 50 times higher. 24% of homosexuals are carriers of meningococcus compared with 6% among heterosexual women, among the homosexuals who recently had oral-anal contact, 43% were carriers. Meningococcus was also detected in 4.5% of homosexuals in the anal channel. In 2016 there was a discovered a new strain of meningococcus that can be transmitted sexually.
CDC reports that in 2016, 57% of those meningococcal men over 16 years of age reported having a homosexual contact. More:   .
HIV infection increases the risk of meningococcal infection 11-fold, and AIDS 12-fold. In 2010, a new outbreak of meningococcus among homosexuals began in New York City, due to mobile dating applications and visits to gay bars.Outbreak of hepatitis A associated with men who have sex with men (MSM), England, July 2016 to January 2017. 2017, Beebeejaun, Euro Surveill
In 2016-17 large cities in Europe swept the wave of outbreaks of hepatitis A. The vast majority of cases were homosexuals.
In England, there were 37 cases.
46 cases were registered in the Barcelona hospital, 96% of them men, and 67% identified themselves as homosexuals. The authors write that the main risk factor is oral-anal contact during sex that the last outbreaks in Europe were between 2008 and 2011, and that because of these outbreaks, hepatitis A has been classified as an STD.Ongoing outbreaks of hepatitis A among men who have sex with men (MSM), Berlin, November 2016 to January 2017 - linked to other German cities and European countries. 2017, Werber, Euro Surveill
Outbreak in Berlin: 38 cases, 37 men, 30 reported homosexual relationships. The woman also reported same-sex relationships.
One of the patients was vaccinated 11 months before the onset of the illness.
Here outbreaks are reported in Rome and its environs, 513 cases, of which 87.5% are men. 
Here reported an outbreak in Tel Aviv, 19 cases, from there are 17 homosexuals. 
Here reported that only 16 European there were 1500 cases of hepatitis A, and 2,660 unacknowledged cases, mostly among homosexuals. Here it is reported that from January to August 2017, 11,212 cases were registered in Europe, mainly among homosexuals.
WHO reports also about the outbreak among homosexuals in Chile.
It all started with a gay parade in Amsterdam in 2016, which attracted half a million visitors.In total, the Netherlands recorded 48 cases among men.Hepatitis A outbreak in HIV-infected MSM and in PrEP-using MSM despite the high level of immunity, Lyon, France, January to June 2017. 2017, Charre, Euro Surveill
The outbreak of hepatitis A in Lyon in the first half of 2017. 46 cases, 38 of them men, 33 homosexuals, and 15 infected with HIV Most were vaccinated or had antibodies. According to the available model, 70% who have immunity to prevent hepatitis A infection among homosexuals.The authors conclude that 70% is not enough.
It is also reported that since it is possible to get hepatitis A from the reuse of needles, slamming (intravenous drug use during anal sex contact) - a practice that is gaining popularity among some groups of homosexuals may also increase the risk of the disease. More: , [2 ].
Hepatitis A outbreak in Taiwan: More than 1,000 cases, 70% of them homosexuals, 60% infected with HIV, and more than 60% were infected with syphilis, gonorrhea or shigellosis. It is not mentioned anywhere that in all of these outbreaks someone died of hepatitis A.